gha: use setup-python v5

Author: andrewhsu

.github/workflows/render-pr-body-release-notes.yml

@@ -22,7 +22,7 @@ jobs:
           curl -s -S -f -L -o rpchangelog/requirements.txt https://vectorized-public.s3.us-west-2.amazonaws.com/rpchangelog/requirements.txt
           curl -s -S -f -L -o rpchangelog/rpchangelog.py https://vectorized-public.s3.us-west-2.amazonaws.com/rpchangelog/rpchangelog.py
           chmod +x rpchangelog/rpchangelog.py
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.10'
           cache: 'pip'