[Locales] Fix gh workflow

.github/workflows/generates_locales.yml

@@ -3,6 +3,7 @@ on:
   push:
     branches:
     - master
+    - generates_locales
     paths:
     - 'doc/**'
     - '!doc/locale/**'
@@ -16,10 +17,10 @@ jobs:
         docs-folder: "doc/"
         pre-build-command: pip install -r requirements.txt
         build-command: make gettext
-    - uses: actions/checkout@v2
-      - name: Commit report
-        run: |
+    - name: Commit report
+      run: |
           git config --global user.name 'Nextcloud Bot'
           git config --global user.email 'bot@nextcloud.com'
-          git commit -am "Updates catalog templates (POT files fetched automatically by transifex)"
-          git push
+          git add -f doc/_build/locale
+          git diff-index --quiet HEAD || git commit -am "Updates catalog templates (POT files fetched automatically by transifex)"
+          git push