Link to issue number:

Closes #17284

Summary of the issue:

NVDA project is using outdated Sphinx and sphinx-rtd-theme dependency.

Description of user facing changes

None

Description of development approach

Updated Sphinx and sphinx-rtd-theme to 8.1.2 and 3.0.1, respectively (did the latter first to ensure latest compatible Sphinx is picked up).

Testing strategy:

Manual testing:

1. Update the dependencies.
2. Run "scons devDocs" to make sure documentation is still readable.

Known issues with pull request:

None

Code Review Checklist:

• Documentation:
  • Change log entry
  • User Documentation
  • Developer / Technical Documentation
  • Context sensitive help for GUI changes
• Testing:
  • Unit tests
  • System (end to end) tests
  • Manual testing
• UX of all users considered:
  • Speech
  • Braille
  • Low Vision
  • Different web browsers
  • Localization in other languages / culture than English
• API is compatible with existing add-ons.
• Security precautions taken.

@coderabbitai summary