[hibernate#1935] Add extra parameter to PostgreSQL podman instructions

Author: DavideD

podman.md

@@ -38,6 +38,7 @@ required credentials and schema to run the tests:
 ```
 podman run --rm --name HibernateTestingPGSQL \
     -e POSTGRES_USER=hreact -e POSTGRES_PASSWORD=hreact -e POSTGRES_DB=hreact \
+    -e POSTGRES_INITDB_ARGS="-A password" \
     -p 5432:5432 docker.io/postgres:16.3
 ```