Bump actions/setup-python from 6 to 7 (#2420)

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Author: dependabot[bot]

.github/workflows/deploy_docs_ghpages.yml

@@ -26,7 +26,7 @@ jobs:
           ref: ${{ github.event.inputs.branch }}
 
       - name: Set up Python
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: '3.x'