Bump the dependencies group with 2 updates

Bumps the dependencies group with 2 updates: org.openjfx:javafx-fxml and org.openjfx:javafx-controls.


Updates `org.openjfx:javafx-fxml` from 20.0.2 to 21

Updates `org.openjfx:javafx-controls` from 20.0.2 to 21

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

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

pom.xml

@@ -32,7 +32,7 @@
         <FROST-Client.version>0.44</FROST-Client.version>
         <hivemq-client.version>1.3.2</hivemq-client.version>
         <logback.version>1.4.11</logback.version>
-        <openjfx.version>20.0.2</openjfx.version>
+        <openjfx.version>21</openjfx.version>
         <slf4j.version>2.0.9</slf4j.version>
     </properties>