Bump watchdog[watchmedo] from 2.1.8 to 2.1.9 in /requirements (#19348)
Bump watchdog[watchmedo] from 2.1.8 to 2.1.9 in /requirements (#19348)

Bumps [watchdog[watchmedo]](https://github.com/gorakhargosh/watchdog) from 2.1.8 to 2.1.9.
- [Release notes](https://github.com/gorakhargosh/watchdog/releases)
- [Changelog](https://github.com/gorakhargosh/watchdog/blob/master/changelog.rst)
- [Commits](https://github.com/gorakhargosh/watchdog/compare/v2.1.8...v2.1.9)

---
updated-dependencies:
- dependency-name: watchdog[watchmedo]
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
diox/olympia,diox/olympia,mozilla/addons-server,wagnerand/addons-server,wagnerand/addons-server,wagnerand/addons-server,mozilla/addons-server,diox/olympia,diox/olympia,mozilla/addons-server,wagnerand/addons-server,mozilla/addons-server