fix(config): 🔧 Update Forgejo client credentials format

Refactor the configuration to use environment variable syntax for Forgejo client ID and secret.

This change improves consistency and readability in the configuration file.

otc/observability.t09.de/stacks/core/dex/values.yaml

@@ -52,8 +52,8 @@ config:
       id: gitea
       name: Forgejo
       config:
-        clientID: "{{`{{ .Env.FORGEJO_CLIENT_ID }}`}}"
-        clientSecret: "{{`{{ .Env.FORGEJO_CLIENT_SECRET }}`}}"
+        clientID: "$FORGEJO_CLIENT_ID"
+        clientSecret: "$FORGEJO_CLIENT_SECRET"
         redirectURI: https://dex.observability.t09.de/callback
         baseURL: https://edp.buildth.ing
   enablePasswordDB: false