runner ubuntu os version updated (#17)

Signed-off-by: Jaseem Jas <[email protected]>
Co-authored-by: Arun Venkataswamy <[email protected]>

Author: jaseemjaskp

.github/workflows/pypi-publish.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   pypi-publish:
     name: upload release to PyPI
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     permissions:
       contents: read
       id-token: write