fix: missing parameters to create github app token

Author: bruzina

.github/workflows/sync-files.yaml

@@ -23,6 +23,8 @@ jobs:
         with:
           app-id: ${{ vars.GH_APP_SEM_REL_ID }}
           private-key: ${{ secrets.GH_APP_SEM_REL_PEM_FILE }}
+          owner: ${{ github.ref == 'refs/heads/main' && 'xebis' || 'xebis-test' }}
+          repositories: ${{ matrix.repository }}
 
       - name: Checkout target repository
         uses: actions/checkout@v5