refactor: update buf publish source directory

.github/workflows/buf-publish.yml

@@ -36,7 +36,7 @@ jobs:
           r2-access-key-id: ${{ secrets.R2_ACCESS_KEY_ID }}
           r2-secret-access-key: ${{ secrets.R2_SECRET_ACCESS_KEY }}
           r2-bucket: pkljar
-          source-dir: config/pkl
+          source-dir: app/config/pkl
           destination-dir: .
 
   upload_nebula_cdn: