Bump testfx.version from 4.0.17 to 4.0.18

Bumps `testfx.version` from 4.0.17 to 4.0.18.

Updates `org.testfx:testfx-core` from 4.0.17 to 4.0.18
- [Release notes](https://github.com/TestFX/TestFX/releases)
- [Changelog](https://github.com/TestFX/TestFX/blob/master/CHANGES.md)
- [Commits](https://github.com/TestFX/TestFX/commits)

Updates `org.testfx:testfx-junit5` from 4.0.17 to 4.0.18
- [Release notes](https://github.com/TestFX/TestFX/releases)
- [Changelog](https://github.com/TestFX/TestFX/blob/master/CHANGES.md)
- [Commits](https://github.com/TestFX/TestFX/commits)

---
updated-dependencies:
- dependency-name: org.testfx:testfx-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.testfx:testfx-junit5
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -320,7 +320,7 @@
         <eventstudio.version>4.0.0</eventstudio.version>
         <injector.version>5.0.0</injector.version>
         <ikonli.version>12.3.1</ikonli.version>
-        <testfx.version>4.0.17</testfx.version>
+        <testfx.version>4.0.18</testfx.version>
         <jackson.version>2.17.2</jackson.version>
         <bouncycastle.version>1.78.1</bouncycastle.version>
         <assertj.version>3.25.3</assertj.version>