chore: Upgrade Python requirements

Author: edx-requirements-bot

requirements/base.txt

@@ -16,7 +16,7 @@ babel==2.18.0
     # via
     #   pydata-sphinx-theme
     #   sphinx
-beautifulsoup4==4.14.3
+beautifulsoup4==4.15.0
     # via pydata-sphinx-theme
 certifi==2026.5.20
     # via requests
@@ -132,7 +132,7 @@ sphinxemoji==0.3.2
     # via -r requirements/base.in
 sphinxext-rediraffe==0.3.0
     # via -r requirements/base.in
-starlette==1.2.1
+starlette==1.3.1
     # via sphinx-autobuild
 typing-extensions==4.15.0
     # via