Docs: Update sphinx from 7.x to 9.x (#5755)

* Docs: Update sphinx from 7.x to 9.x

* Update docs.yml

.github/workflows/docs.yml

@@ -26,10 +26,10 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.11
+      - name: Set up Python 3.13
         uses: actions/setup-python@v5
         with:
-          python-version: 3.11
+          python-version: 3.13
       - uses: actions/cache@v4
         with:
           path: ~/.cache/pip