Update runner version to ubuntu-22.04

Author: nikola-milikic

.github/workflows/ci-pull-request.yml

@@ -20,7 +20,7 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v3