chore(deps): update actions/setup-python action to v6

Author: anaconda-renovate[bot]

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
 
     - name: Set up Python
-      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
       with:
         python-version: ${{ matrix.python-version }}