Bump openjfx.version from 19.0.2.1 to 21

Bumps `openjfx.version` from 19.0.2.1 to 21.

Updates `org.openjfx:javafx-controls` from 19.0.2.1 to 21

Updates `org.openjfx:javafx-web` from 19.0.2.1 to 21

---
updated-dependencies:
- dependency-name: org.openjfx:javafx-controls
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.openjfx:javafx-web
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

phoenicis-javafx/pom.xml

@@ -26,7 +26,7 @@
     <artifactId>phoenicis-javafx</artifactId>
     <properties>
         <project.root>${project.basedir}/../</project.root>
-        <openjfx.version>19.0.2.1</openjfx.version>
+        <openjfx.version>21</openjfx.version>
         <testfx.version>4.0.15-alpha</testfx.version>
     </properties>
     <dependencies>