Fix wrong link in trino-superset-s3 stack (#257)

## Description

*Please add a description here. This will become the commit message of the merge request later.*

Author: sbernauer

stacks/stacks-v2.yaml

@@ -230,7 +230,7 @@ stacks:
       - helmChart: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/_templates/minio.yaml
       - helmChart: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/_templates/postgresql-hive.yaml
       - helmChart: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/_templates/postgresql-superset.yaml
-      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/trino-superset-s3/s3-credentials.yaml
+      - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/trino-superset-s3/s3-connection.yaml
       - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/trino-superset-s3/hive-metastore.yaml
       - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/trino-superset-s3/trino.yaml
       - plainYaml: https://raw.githubusercontent.com/stackabletech/stackablectl/main/stacks/trino-superset-s3/superset.yaml