ci: refresh docs build dependencies (#3062)

Co-authored-by: Ansible Documentation Bot <147556122+ansible-documentation-bot[bot]@users.noreply.github.com>

Author: ansible-documentation-bot[bot]

tests/requirements.txt

@@ -54,7 +54,7 @@ build==1.3.0
     # via antsibull-core
 certifi==2025.8.3
     # via requests
-cffi==1.17.1 ; platform_python_implementation != 'PyPy'
+cffi==2.0.0 ; platform_python_implementation != 'PyPy'
     # via cryptography
 charset-normalizer==3.4.3
     # via requests
@@ -113,9 +113,9 @@ propcache==0.3.2
     # via
     #   aiohttp
     #   yarl
-pycparser==2.22 ; platform_python_implementation != 'PyPy'
+pycparser==2.23 ; implementation_name != 'PyPy' and platform_python_implementation != 'PyPy'
     # via cffi
-pydantic==2.11.7
+pydantic==2.11.9
     # via
     #   antsibull-changelog
     #   antsibull-core