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

Bumps [twisted](https://github.com/twisted/twisted) from 22.4.0 to 22.8.0.
- [Release notes](https://github.com/twisted/twisted/releases)
- [Changelog](https://github.com/twisted/twisted/blob/trunk/NEWS.rst)
- [Commits](twisted/twisted@twisted-22.4.0...twisted-22.8.0)

---
updated-dependencies:
- dependency-name: twisted
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

testing/plugins_integration/requirements.txt

@@ -11,5 +11,5 @@ pytest-rerunfailures==10.2
 pytest-sugar==0.9.5
 pytest-trio==0.7.0
 pytest-twisted==1.13.4
-twisted==22.4.0
+twisted==22.8.0
 pytest-xvfb==2.0.0