Distinguish between the cluster in docs and examples
Distinguish between the cluster in docs and examples

The manifest in the docs is very similar to the files in the examples
repository. Drop the similar filename, and mention the "hippo" cluster
again.

Co-authored-by: Andrew L'Ecuyer <3f19f6d51444a9df0d357e5cfc0e24e6c2dbd3ba@crunchydata.com>
Issue: [sc-12724]

CrunchyData/postgres-operator,CrunchyData/postgres-operator