Bump selenium-server-standalone-jar from 4.19.1 to 4.21.0

Bumps [selenium-server-standalone-jar](https://github.com/adamhooper/selenium-server-standalone-jar) from 4.19.1 to 4.21.0.
- [Commits](https://github.com/adamhooper/selenium-server-standalone-jar/commits)

---
updated-dependencies:
- dependency-name: selenium-server-standalone-jar
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -23,7 +23,7 @@
     "jasmine": "^5.1.0",
     "jasmine-core": "^5.1.2",
     "nightwatch": "^3.6.3",
-    "selenium-server-standalone-jar": "4.19.1",
+    "selenium-server-standalone-jar": "4.21.0",
     "webpack": "^5.92.1",
     "webpack-cli": "^5.1.4"
   },