Use latest ubuntu in runners

Signed-off-by: Marten Richter <marten.richter@freenet.de>

Author: martenrichter

.github/workflows/publish-packages.yml

@@ -56,7 +56,7 @@ jobs:
     needs: version-check
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2022, macos-13 ]
+        os: [ubuntu-22.04, windows-2022, macos-13 ]
         arch: [x64]
         include:
           - arch: ia32