Update test job runner to ubuntu latest since 20.04 is being removed today (April 15)

Author: briluza

.github/workflows/test-build-publish.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         python-version: ["3.9", "3.10", "3.11"]