Update README.md

Updated instructions on how to access public BigQuery dataset in section [public-data] (https://github.com/ossf/scorecard/edit/main/README.md#public-data)

Author: st-mn

README.md

@@ -88,6 +88,8 @@ This data is available in the public BigQuery dataset
 `openssf:scorecardcron.scorecard-v2`. The latest results are available in the
 BigQuery view `openssf:scorecardcron.scorecard-v2_latest`.
 
+You can query the data using [BigQuery Explorer](http://console.cloud.google.com/bigquery) by navigating to Add Data > Pin a Project > Enter Project Name > 'openssf'
+
 You can extract the latest results to Google Cloud storage in JSON format using
 the [`bq`](https://cloud.google.com/bigquery/docs/bq-command-line-tool) tool: