build(deps): bump watchdog from 2.1.6 to 4.0.0

Bumps [watchdog](https://github.com/gorakhargosh/watchdog) from 2.1.6 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@v2.1.6...v4.0.0)

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

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

requirements.txt

@@ -16,5 +16,5 @@ py-irclib == 0.3.0
 pyowm == 3.3.0
 requests == 2.31.0
 urllib3 == 2.2.1
-watchdog == 2.1.6
+watchdog == 4.0.0
 yarl == 1.9.4