Python dependency: Bump selenium from 4.8.3 to 4.9.1 in /web/regression (#6265)

Bumps [selenium](https://github.com/SeleniumHQ/Selenium) from 4.8.3 to 4.9.1.
- [Release notes](https://github.com/SeleniumHQ/Selenium/releases)
- [Commits](https://github.com/SeleniumHQ/Selenium/commits/selenium-4.9.1)

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

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

web/regression/requirements.txt

@@ -25,5 +25,5 @@ python-mimeparse==1.6.0
 testscenarios==0.5.0
 testtools==2.6.0
 traceback2==1.4.0
-selenium==4.8.3
+selenium==4.9.1
 coverage==7.2.3