🌱 Bump watchdog from 3.0.0 to 4.0.0 (#617)

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/gorakhargosh/watchdog/releases)
- [Changelog](https://github.com/gorakhargosh/watchdog/blob/master/changelog.rst)
- [Commits](gorakhargosh/watchdog@v3.0.0...v4.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -32,4 +32,4 @@ requests==2.31.0
 six==1.16.0
 soupsieve==2.5
 urllib3==2.2.0
-watchdog==3.0.0
+watchdog==4.0.0