chore: Use newer version as 20.04 is EOL soon (see actions/runner-images#11101)

Author: jhutar

.github/workflows/pr-checks.yaml

@@ -10,7 +10,7 @@ env: {}
 jobs:
   lint:
     name: Code Quality
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     steps:
       - name: Set up Python