chore(config): ⬆️ Bump Forgejo Helm chart to v16.2.0

Updates the Helm chart version to incorporate the latest features,
improvements, and bug fixes from upstream. Ensures deployment uses a
more recent and supported release.

template/stacks/forgejo/forgejo-server.yaml

@@ -20,7 +20,7 @@ spec:
   sources:
     - repoURL: https://code.forgejo.org/forgejo-helm/forgejo-helm.git
       path: .
-      targetRevision: v12.0.0
+      targetRevision: v16.2.0
       helm:
         valueFiles:
           - $values/{{{ .Env.CLIENT_REPO_ID }}}/{{{ .Env.DOMAIN }}}/stacks/forgejo/forgejo-server/values.yaml