Bump selenium-webdriver from 4.0.0-alpha.7 to 4.0.0-beta.4 (#7103)

Bumps [selenium-webdriver](https://github.com/SeleniumHQ/selenium) from 4.0.0-alpha.7 to 4.0.0-beta.4.
- [Release notes](https://github.com/SeleniumHQ/selenium/releases)
- [Commits](https://github.com/SeleniumHQ/selenium/commits)

---
updated-dependencies:
- dependency-name: selenium-webdriver
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

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

package.json

@@ -157,7 +157,7 @@
     "rxjs-tslint-rules": "^4.34.7",
     "sass-loader": "10.1.1",
     "scss-bundle": "2.3.2",
-    "selenium-webdriver": "4.0.0-alpha.7",
+    "selenium-webdriver": "4.0.0-beta.4",
     "stylelint": "^13.13.1",
     "ts-node": "^10.0.0",
     "tsconfig-paths": "^3.9.0",