Bump the gradle-dependencies group in /functional-tests with 3 updates (#124)

Bumps the gradle-dependencies group in /functional-tests with 3 updates: [org.htmlunit:htmlunit](https://github.com/HtmlUnit/htmlunit), [org.jsoup:jsoup](https://github.com/jhy/jsoup) and [org.json:json](https://github.com/douglascrockford/JSON-java).


Updates `org.htmlunit:htmlunit` from 4.19.0 to 4.21.0
- [Release notes](https://github.com/HtmlUnit/htmlunit/releases)
- [Commits](HtmlUnit/htmlunit@4.19.0...4.21.0)

Updates `org.jsoup:jsoup` from 1.21.2 to 1.22.1
- [Release notes](https://github.com/jhy/jsoup/releases)
- [Changelog](https://github.com/jhy/jsoup/blob/master/CHANGES.md)
- [Commits](jhy/jsoup@jsoup-1.21.2...jsoup-1.22.1)

Updates `org.json:json` from 20250517 to 20251224
- [Release notes](https://github.com/douglascrockford/JSON-java/releases)
- [Changelog](https://github.com/stleary/JSON-java/blob/master/docs/RELEASES.md)
- [Commits](https://github.com/douglascrockford/JSON-java/commits)

---
updated-dependencies:
- dependency-name: org.htmlunit:htmlunit
  dependency-version: 4.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle-dependencies
- dependency-name: org.jsoup:jsoup
  dependency-version: 1.22.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle-dependencies
- dependency-name: org.json:json
  dependency-version: '20251224'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gradle-dependencies
...

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

Author: dependabot[bot]

functional-tests/build.gradle

@@ -11,11 +11,11 @@ repositories {
 dependencies {
     testImplementation 'junit:junit:4.13.2'
     testImplementation 'com.thoughtworks.gauge:gauge-java:+'
-    testImplementation 'org.htmlunit:htmlunit:4.19.0'
+    testImplementation 'org.htmlunit:htmlunit:4.21.0'
     testImplementation 'se.fishtank:css-selectors:2.0'
-    testImplementation 'org.jsoup:jsoup:1.21.2'
+    testImplementation 'org.jsoup:jsoup:1.22.1'
     testImplementation 'org.assertj:assertj-core:3.27.6'
-    testImplementation 'org.json:json:20250517'
+    testImplementation 'org.json:json:20251224'
 }
 
 java {