Bump org.htmlunit:htmlunit from 4.13.0 to 4.15.0 (#3171)

Bumps [org.htmlunit:htmlunit](https://github.com/HtmlUnit/htmlunit) from 4.13.0 to 4.15.0.
- [Release notes](https://github.com/HtmlUnit/htmlunit/releases)
- [Commits](HtmlUnit/htmlunit@4.13.0...4.15.0)

---
updated-dependencies:
- dependency-name: org.htmlunit:htmlunit
  dependency-version: 4.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -199,7 +199,7 @@
       <dependency>
         <groupId>org.htmlunit</groupId>
         <artifactId>htmlunit</artifactId>
-        <version>4.13.0</version>
+        <version>4.15.0</version>
       </dependency>
       <dependency>
         <!-- used in the unit tests and maven-shared-utils:3.3.4 -->