Use latest ubuntu to build releases.

Author: TkTech

.github/workflows/release.yml

@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-11]
+        os: [ubuntu-latest, windows-2019, macos-11]
         py: ["cp37", "cp38", "cp39", "cp310", "cp311", "pp37", "pp38", "pp39"]
 
     steps: