fix: add repository overrides for bitnami subcharts in helmchart.yaml

ReplicatedImageRegistry returns only the registry host (proxy.replicated.com),
not the full proxy path. Bitnami charts append their own default repository
(bitnami/postgresql) producing a broken URL missing the /proxy/gameshelf/index.docker.io/
prefix. Override repository to embed the full proxy path, matching the pattern
that works for the gameshelf image.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: aa-replicated

helmchart.yaml

@@ -22,12 +22,15 @@ spec:
     postgresql:
       image:
         registry: 'repl{{ ReplicatedImageRegistry "index.docker.io/bitnami/postgresql" }}'
+        repository: 'proxy/gameshelf/index.docker.io/bitnami/postgresql'
       volumePermissions:
         image:
           registry: 'repl{{ ReplicatedImageRegistry "index.docker.io/bitnami/os-shell" }}'
+          repository: 'proxy/gameshelf/index.docker.io/bitnami/os-shell'
     redis:
       image:
         registry: 'repl{{ ReplicatedImageRegistry "index.docker.io/bitnami/redis" }}'
+        repository: 'proxy/gameshelf/index.docker.io/bitnami/redis'
   builder:
     postgresql:
       image: