[Backport branch-8-2] upgrade Alabaster theme to 1.0.0 release (#955)

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Author: github-actions[bot]

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.10.12
 
       - name: Build docs
         run: |

requirements.txt

@@ -1,6 +1,6 @@
-alabaster==0.7.16
+alabaster==1.0.0
 docutils==0.21.2
-sphinx==7.4.7
+sphinx==8.0.2
 sphinx-copybutton==0.5.2
 sphinxcontrib-jquery==4.1
 --extra-index-url https://test.pypi.org/simple/