Update actions/setup-python action to v5

Author: renovate[bot]

.github/workflows/tests.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
 
     steps:
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - uses: actions/checkout@v4