Merge pull request #14436 from nextcloud/workflow/update-.github/workflows/sphinxbuild.yml-stable32

Author: skjnldsv

.github/workflows/sphinxbuild.yml

@@ -117,7 +117,7 @@ jobs:
 
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
-          python-version: "3.12"
+          python-version: "3.13"
           cache: "pip"
 
       - name: Install pip dependencies