build(forgejo): ⬆️ Bump Helm chart version to v16.2.0

Updates the Helm chart source to a newer version to leverage the latest features, improvements, and bug fixes for Forgejo deployment.

otc/dev.t09.de/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/otc/dev.t09.de/stacks/forgejo/forgejo-server/values.yaml
@@ -29,4 +29,5 @@ spec:
       ref: values
     - repoURL: https://edp.buildth.ing/DevFW-CICD/stacks-instances
       targetRevision: HEAD
-      path: "otc/dev.t09.de/stacks/forgejo/forgejo-server/manifests"
+      path: "otc/dev.t09.de/stacks/forgejo/forgejo-server/manifests"
+