Bump watchdog from 4.0.2 to 6.0.0

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 4.0.2 to 6.0.0.
- [Release notes](https://github.com/gorakhargosh/watchdog/releases)
- [Changelog](https://github.com/gorakhargosh/watchdog/blob/master/changelog.rst)
- [Commits](gorakhargosh/watchdog@v4.0.2...v6.0.0)

---
updated-dependencies:
- dependency-name: watchdog
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]