Update pytest requirement from ~=8.3.5 to ~=8.4.1

[dependabot[bot]]

Updates the requirements on pytest to permit the latest version.

Release notes

Sourced from pytest's releases.

8.4.1

pytest 8.4.1 (2025-06-17)

Bug fixes

• #13461: Corrected _pytest.terminal.TerminalReporter.isatty to support being called as a method. Before it was just a boolean which could break correct code when using -o log_cli=true).

• #13477: Reintroduced pytest.PytestReturnNotNoneWarning{.interpreted-text role="class"} which was removed by accident in pytest [8.4]{.title-ref}.

  This warning is raised when a test functions returns a value other than None, which is often a mistake made by beginners.

  See return-not-none{.interpreted-text role="ref"} for more information.

• #13497: Fixed compatibility with Twisted 25+.

Improved documentation

• #13492: Fixed outdated warning about faulthandler not working on Windows.

Commits

• 8d99211 Prepare release version 8.4.1
• 5dc5880 docs: update pytest.ini addopts example to use separate -p entries (#13529) (...
• d0c7ed0 Reintroduce PytestReturnNotNoneWarning (#13495) (#13527)
• a1b3a78 Fix compatibility with Twisted 25 (#13502) (#13531)
• 4c161ab pytester: avoid unraisableexception gc collects in inline runs to speed up te...
• a86ee09 Fix typo in parametrize.rst (#13514) (#13516)
• 1a0581b Remove outdated warning about faulthandler_timeout on Windows (#13492) (#13493)
• 4e631a7 Merge pull request #13486 from hosmir/fixtypo (#13487)
• b49745e fix: support TerminalReporter.isatty being called (#13462) (#13483)
• cc5ceed RELEASING: remove pytest mailing list (#13472) (#13473)
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