Fix links in stack kafka-druid-superset-s3 (#75)

## Description

Author: sbernauer

stacks/stacks-v1.yaml

@@ -49,10 +49,10 @@ stacks:
               username: superset
               password: superset
               database: superset
-      - plainYaml: stacks/kafka-druid-superset-s3/zookeeper.yaml # TODO
-      - plainYaml: stacks/kafka-druid-superset-s3/kafka.yaml # TODO
-      - plainYaml: stacks/kafka-druid-superset-s3/druid.yaml # TODO
-      - plainYaml: stacks/kafka-druid-superset-s3/superset.yaml # TODO
+      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/kafka-druid-superset-s3/zookeeper.yaml
+      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/kafka-druid-superset-s3/kafka.yaml
+      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/kafka-druid-superset-s3/druid.yaml
+      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/kafka-druid-superset-s3/superset.yaml
   trino-superset-s3:
     description: Stack containing MinIO, Trino and Superset for data visualization
     stackableRelease: 22.06