Upgrade setup-python action to version 6

Author: tmclaugh

action.yaml

@@ -12,7 +12,7 @@ runs:
   steps:
     - name: Setup Python
       id: install-python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: '${{ inputs.python_version }}'
         cache: pipenv
@@ -49,4 +49,4 @@ outputs:
     value: ${{ steps.install-python.outputs.python-path }}
   cache-hit:
     description: Cache hit
-    value: ${{ steps.install-python.outputs.cache-hit }}
+    value: ${{ steps.install-python.outputs.cache-hit }}