Bump org.htmlunit:htmlunit from 4.8.0 to 4.9.0

Bumps [org.htmlunit:htmlunit](https://github.com/HtmlUnit/htmlunit) from 4.8.0 to 4.9.0.
- [Release notes](https://github.com/HtmlUnit/htmlunit/releases)
- [Commits](HtmlUnit/htmlunit@4.8.0...4.9.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

build-parent/pom.xml

@@ -33,7 +33,7 @@
         <jandex-gradle-plugin.version>1.0.0</jandex-gradle-plugin.version>
 
         <asciidoctorj.version>2.5.13</asciidoctorj.version>
-        <htmlunit.version>4.8.0</htmlunit.version>
+        <htmlunit.version>4.9.0</htmlunit.version>
         <javaparser-core.version>3.26.3</javaparser-core.version>
         <jdeparser.version>2.0.3.Final</jdeparser.version>
         <subethasmtp.version>6.0.1</subethasmtp.version>