Add Axiom to list of vendors (open-telemetry#963)

We would very much like to add [Axiom](axiom.co) to the list of vendors in the README. I linked a public demo dashboard that is feed by the demo.

Author: mohamed3637

README.md

@@ -53,16 +53,16 @@ We welcome any vendor to fork the project to demonstrate their services and
 adding a link below. The community is committed to maintaining the project and
 keeping it up to date for you.
 
-|                                                                                                                   |                                                                   |                                                                                              |
-| ----------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
-| [AlibabaCloud LogService](https://github.com/aliyun-sls/opentelemetry-demo)                                       | [Grafana Labs](https://github.com/grafana/opentelemetry-demo)     |  [Sentry](https://github.com/getsentry/opentelemetry-demo)                                    |
-| [AppDynamics](https://www.appdynamics.com/blog/cloud/how-to-observe-opentelemetry-demo-app-in-appdynamics-cloud/) | [Helios](https://otelsandbox.gethelios.dev)                       | [Splunk](https://github.com/signalfx/opentelemetry-demo)                                     |
-| [Aspecto](https://github.com/aspecto-io/opentelemetry-demo)                                                       | [Honeycomb.io](https://github.com/honeycombio/opentelemetry-demo) | [Sumo Logic](https://www.sumologic.com/blog/common-opentelemetry-demo-application/)          |
-| [Azure Data Explorer](https://github.com/Azure/Azure-kusto-opentelemetry-demo) | [Instana](https://github.com/instana/opentelemetry-demo)          | [TelemetryHub](https://github.com/TelemetryHub/opentelemetry-demo/tree/telemetryhub-backend) |
-| [Coralogix](https://coralogix.com/blog/configure-otel-demo-send-telemetry-data-coralogix)                         | [Kloudfuse](https://github.com/kloudfuse/opentelemetry-demo)      | [Teletrace](https://github.com/teletrace/opentelemetry-demo) |
-| [Datadog](https://github.com/DataDog/opentelemetry-demo)                                                          | [Lightstep](https://github.com/lightstep/opentelemetry-demo)      | [Uptrace](https://github.com/uptrace/uptrace/tree/master/example/opentelemetry-demo)                                 |
-| [Dynatrace](https://www.dynatrace.com/news/blog/opentelemetry-demo-application-with-dynatrace/)                   | [New Relic](https://github.com/newrelic/opentelemetry-demo)       |         |
-| [Elastic](https://github.com/elastic/opentelemetry-demo)                                                          | [OpenSearch](https://github.com/opensearch-project/opentelemetry-demo)                       |                                                                                             |
+|                                                                                                                   |                                                                        |                                                                                              |
+| ----------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
+| [AlibabaCloud LogService](https://github.com/aliyun-sls/opentelemetry-demo)                                       | [Elastic](https://github.com/elastic/opentelemetry-demo)               | [OpenSearch](https://github.com/opensearch-project/opentelemetry-demo)                       |
+| [AppDynamics](https://www.appdynamics.com/blog/cloud/how-to-observe-opentelemetry-demo-app-in-appdynamics-cloud/) | [Grafana Labs](https://github.com/grafana/opentelemetry-demo)          | [Sentry](https://github.com/getsentry/opentelemetry-demo)                                    |
+| [Aspecto](https://github.com/aspecto-io/opentelemetry-demo)                                                       | [Helios](https://otelsandbox.gethelios.dev)                            | [Splunk](https://github.com/signalfx/opentelemetry-demo)                                     |
+| [Axiom](https://play.axiom.co/axiom-play-qf1k/dashboards/otel.traces.otel-demo-traces)                            | [Honeycomb.io](https://github.com/honeycombio/opentelemetry-demo)      | [Sumo Logic](https://www.sumologic.com/blog/common-opentelemetry-demo-application/)          |
+| [Azure Data Explorer](https://github.com/Azure/Azure-kusto-opentelemetry-demo)                                    | [Instana](https://github.com/instana/opentelemetry-demo)               | [TelemetryHub](https://github.com/TelemetryHub/opentelemetry-demo/tree/telemetryhub-backend) |
+| [Coralogix](https://coralogix.com/blog/configure-otel-demo-send-telemetry-data-coralogix)                         | [Kloudfuse](https://github.com/kloudfuse/opentelemetry-demo)           | [Teletrace](https://github.com/teletrace/opentelemetry-demo)                                 |
+| [Datadog](https://github.com/DataDog/opentelemetry-demo)                                                          | [Lightstep](https://github.com/lightstep/opentelemetry-demo)           | [Uptrace](https://github.com/uptrace/uptrace/tree/master/example/opentelemetry-demo)         |
+| [Dynatrace](https://www.dynatrace.com/news/blog/opentelemetry-demo-application-with-dynatrace/)                   | [New Relic](https://github.com/newrelic/opentelemetry-demo)            | |
 
 ## Contributing