Update redisvl_docs_sync.yaml (#2486)

Author: paoloredis

.github/workflows/redisvl_docs_sync.yaml

@@ -40,7 +40,7 @@ jobs:
 
       - name: 'Install deps'
         run: |
-          pip3 install -U sphinx
+          pip3 install sphinx==8.2.3
           pip3 install sphinx_design sphinx_copybutton nbsphinx sphinx_favicon myst_nb sphinx_markdown_builder==0.6.8 jupyter
 
       - name: 'Fetch redisvl repo'
@@ -338,4 +338,4 @@ jobs:
                 --head "$branch" \
                 --base "main"
             fi
-          fi
+          fi