Bump selenium from 4.20.0 to 4.21.0 (#400)

Bumps [selenium](https://github.com/SeleniumHQ/Selenium) from 4.20.0 to 4.21.0.
- [Release notes](https://github.com/SeleniumHQ/Selenium/releases)
- [Commits](SeleniumHQ/selenium@selenium-4.20.0...selenium-4.21.0)

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

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

requirements.txt

@@ -3,6 +3,6 @@ robotframework-requests==0.9.7
 robotframework-seleniumlibrary==6.3.0
 robotframework-sudslibrary-aljcalandra==1.1.4
 requests==2.31.0
-selenium==4.20.0
+selenium==4.21.0
 python-dateutil>=2.8.2
 pandas>=1.3.5