mvn: bump com.formdev:flatlaf from 3.0 to 3.5.1

Bumps [com.formdev:flatlaf](https://github.com/JFormDesigner/FlatLaf) from 3.0 to 3.5.1.
- [Release notes](https://github.com/JFormDesigner/FlatLaf/releases)
- [Changelog](https://github.com/JFormDesigner/FlatLaf/blob/main/CHANGELOG.md)
- [Commits](JFormDesigner/FlatLaf@3.0...3.5.1)

---
updated-dependencies:
- dependency-name: com.formdev:flatlaf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -25,7 +25,7 @@
         <dependency>
             <groupId>com.formdev</groupId>
             <artifactId>flatlaf</artifactId>
-            <version>3.0</version>
+            <version>3.5.1</version>
         </dependency>
     </dependencies>