Update actions/setup-python action from v2 to v5 (.github/workflows/slack-pr-reminder.yml) (#12149)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/slack-pr-reminder.yml

@@ -19,7 +19,7 @@ jobs:
           ref: master 
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"