chore: Upgrade Python requirements

Author: edx-requirements-bot

requirements/base.txt

@@ -8,7 +8,7 @@ accessible-pygments==0.0.5
     # via pydata-sphinx-theme
 alabaster==1.0.0
     # via sphinx
-anyio==4.13.0
+anyio==4.14.0
     # via
     #   starlette
     #   watchfiles
@@ -18,7 +18,7 @@ babel==2.18.0
     #   sphinx
 beautifulsoup4==4.15.0
     # via pydata-sphinx-theme
-certifi==2026.5.20
+certifi==2026.6.17
     # via requests
 charset-normalizer==3.4.7
     # via requests