misc,tests: Up actions/setup-python version to v5

This was causing a deprecation warning in GitHub Actions.

Change-Id: I9ab147acf12e3763ab731769468ce5b1dc5e4dea

.github/workflows/ci-tests.yaml

@@ -18,7 +18,7 @@ jobs:
         if: github.event.pull_request.draft == false
         steps:
             - uses: actions/checkout@v4
-            - uses: actions/setup-python@v3
+            - uses: actions/setup-python@v5
             - uses: pre-commit/action@v3.0.0
 
   # ensures we have a change-id in every commit, needed for gerrit