added missing runs-on

Signed-off-by: Akos Kitta <[email protected]>

Author: Akos Kitta

Diff for: .github/workflows/build.yml

@@ -58,6 +58,7 @@ jobs:
   publish:
     needs: build
     if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    runs-on: ubuntu-latest
     steps:
       - name: Download [GitHub Actions]
         uses: actions/download-artifact@v2