Merge pull request #727 from mit-ll-responsible-ai/dependabot/pip/docs/pydantic-2.9.1

Bump pydantic from 2.8.2 to 2.9.1 in /docs

Author: rsokl

docs/requirements.txt

@@ -7,4 +7,4 @@ sphinx-codeautolink==0.15.2
 sphinx_favicon==1.0.1
 # third-party utilities
 beartype==0.18.5
-pydantic==2.8.2
+pydantic==2.9.1