Not strictly necessary to build docs in free-thread release

Author: ponyisi

.github/workflows/ci.yaml

@@ -44,7 +44,7 @@ jobs:
 
       - name: Install dependencies
         run: |
-          uv pip install --upgrade '.[test,docs]'
+          uv pip install --upgrade '.[test]'
           uv pip list
 
       - name: Test with pytest