build(deps): Bump twisted in /testing/plugins_integration

Bumps [twisted](https://github.com/twisted/twisted) from 21.7.0 to 22.1.0.
- [Release notes](https://github.com/twisted/twisted/releases)
- [Changelog](https://github.com/twisted/twisted/blob/trunk/NEWS.rst)
- [Commits](twisted/twisted@twisted-21.7.0...twisted-22.1.0)

---
updated-dependencies:
- dependency-name: twisted
  dependency-type: direct:production
...

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

testing/plugins_integration/requirements.txt

@@ -11,5 +11,5 @@ pytest-rerunfailures==10.2
 pytest-sugar==0.9.4
 pytest-trio==0.7.0
 pytest-twisted==1.13.4
-twisted==21.7.0
+twisted==22.1.0
 pytest-xvfb==2.0.0