Update actions/setup-python action to v6.1.0 (#101)

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

Author: renovate[bot]

.github/workflows/start.yaml

@@ -38,7 +38,7 @@ jobs:
         repository: glotzerlab/jetstream2-admin
         ref: ${{ inputs.ref }}
     - name: Set up Python
-      uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+      uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
       with:
         python-version: "3.14"
     - name: Install openstack