push QCH file only if MR is accepted

fix errors due to github conflict editor being crappy

.github/workflows/auto-doxygen.yml

@@ -16,6 +16,7 @@ jobs:
     permissions:
        contents: write    
     runs-on: ubuntu-24.04
+    if: github.ref == 'refs/heads/master'
     steps:
     - uses: actions/checkout@v4
       with:
@@ -35,8 +36,6 @@ jobs:
           git add .gitattributes ${{ github.workspace }}/doc/QElectroTech.qch -f
           git commit -m "Push updated QCH file"
           git push
-    - name: Run doxygen
-      run: doxygen Doxyfile
     - uses: actions/upload-pages-artifact@v3
       with: 
        path: ${{ github.workspace }}/doc/html/