bump setup-python version in tests

Author: ngoldbaum

.github/workflows/tests.yml

@@ -37,7 +37,7 @@ jobs:
           __version__\s*=\s*(?:['"])([[:PEP440:]])(?:['"])
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3  # v5.2.0
+      uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c  # v6.0.0
       if: steps.release.outputs.version == 0
       with:
         python-version: ${{ matrix.python-version }}