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

Author: renovate[bot]

.github/workflows/docs-pages.yaml

@@ -22,7 +22,7 @@ jobs:
           persist-credentials: false
           fetch-depth: 0
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.10'
       - name: Set up env

.github/workflows/docs-pr.yaml

@@ -21,7 +21,7 @@ jobs:
           persist-credentials: false
           fetch-depth: 0
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: '3.10'
       - name: Set up env