Bump org.openjfx:javafx-controls from 11.0.2 to 12

Bumps org.openjfx:javafx-controls from 11.0.2 to 12.

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

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

examples/pom.xml

@@ -160,7 +160,7 @@
         <dependency>
           <groupId>org.openjfx</groupId>
           <artifactId>javafx-controls</artifactId>
-          <version>11.0.2</version>
+          <version>12</version>
         </dependency>
       </dependencies>
     </profile>