Bump com.google.code.gson:gson from 2.11.0 to 2.12.0

Bumps [com.google.code.gson:gson](https://github.com/google/gson) from 2.11.0 to 2.12.0.
- [Release notes](https://github.com/google/gson/releases)
- [Changelog](https://github.com/google/gson/blob/main/CHANGELOG.md)
- [Commits](google/gson@gson-parent-2.11.0...gson-parent-2.12.0)

---
updated-dependencies:
- dependency-name: com.google.code.gson:gson
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -17,7 +17,7 @@
     <properties>
         <java.version>21</java.version>
         <vaadin.version>24.6.3</vaadin.version>
-        <gson.version>2.11.0</gson.version>
+        <gson.version>2.12.0</gson.version>
         <gson-javatime-serialisers.version>1.1.2</gson-javatime-serialisers.version>
         <commons-io.version>2.18.0</commons-io.version>
         <windmill.version>2.0.1</windmill.version>