Update build-and-release.yaml

Author: xhedit

Diff for: .github/workflows/build-and-release.yaml

@@ -82,7 +82,7 @@ jobs:
   publish-sdist-to-pypi:
     name: Release
     needs: [build_wheels, build_sdist]
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
 
     environment:
       name: pypi