test deb ubuntu

Author: DifferentialOrange

.github/workflows/packing.yml

@@ -428,7 +428,7 @@ jobs:
     if: (github.event_name == 'push') ||
       (github.event_name == 'pull_request' &&
         github.event.pull_request.head.repo.full_name != github.repository)
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     container:
       image: ${{ matrix.target.os }}:${{ matrix.target.dist }}