Use Ubuntu latest

Author: jgray-19

.github/workflows/test-publish.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-latest]
+        os: [ubuntu-latest, macos-latest]
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps: