build(deps): bump pytest from 8.3.3 to 8.4.2 in /block-kit

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.3.3 to 8.4.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.3...8.4.2)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 8.4.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

block-kit/requirements.txt

@@ -1,4 +1,4 @@
 mypy==1.18.2
-pytest==8.3.3
+pytest==8.4.2
 ruff==0.14.3
 slack_sdk==3.37.0