Merge pull request #31 from matplotlib/dependabot/github_actions/actions/setup-python-6

Bump actions/setup-python from 5 to 6

Author: tacaswell

.github/workflows/testing.yml

@@ -24,7 +24,7 @@ jobs:
         persist-credentials: false
 
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}