ci: refresh docs build dependencies

Author: ansible-documentation-bot[bot]

tests/requirements.txt

@@ -115,7 +115,7 @@ propcache==0.4.1
     #   yarl
 pycparser==2.23 ; implementation_name != 'PyPy' and platform_python_implementation != 'PyPy'
     # via cffi
-pydantic==2.12.4
+pydantic==2.12.5
     # via
     #   antsibull-changelog
     #   antsibull-core