Fix static job, pin ubuntu version (redhat-cop#9044)

Author: fridim

.github/workflows/static-checks-pr.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   static-checks:
     name: Run static tests using tox
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         python-version: