Bump preferencesfx-core from 11.5.0 to 11.6.0

Bumps [preferencesfx-core](https://github.com/dlsc-software-consulting-gmbh/PreferencesFX) from 11.5.0 to 11.6.0.
- [Release notes](https://github.com/dlsc-software-consulting-gmbh/PreferencesFX/releases)
- [Changelog](https://github.com/dlsc-software-consulting-gmbh/PreferencesFX/blob/master/CHANGELOG.md)
- [Commits](dlsc-software-consulting-gmbh/PreferencesFX@11.5.0...11.6.0)

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

workbenchfx-demo/pom.xml

@@ -231,7 +231,7 @@
         <dependency>
             <groupId>com.dlsc.preferencesfx</groupId>
             <artifactId>preferencesfx-core</artifactId>
-            <version>11.5.0</version>
+            <version>11.6.0</version>
         </dependency>
 
         <dependency>