Bump com.github.Dansoftowner:jSystemThemeDetector from 3.6 to 3.8

Bumps [com.github.Dansoftowner:jSystemThemeDetector](https://github.com/Dansoftowner/jSystemThemeDetector) from 3.6 to 3.8.
- [Release notes](https://github.com/Dansoftowner/jSystemThemeDetector/releases)
- [Commits](Dansoftowner/jSystemThemeDetector@3.6...3.8)

---
updated-dependencies:
- dependency-name: com.github.Dansoftowner:jSystemThemeDetector
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -180,7 +180,7 @@ dependencies {
     }
 
     implementation 'org.controlsfx:controlsfx:11.2.0'
-    implementation 'com.github.Dansoftowner:jSystemThemeDetector:3.6'
+    implementation 'com.github.Dansoftowner:jSystemThemeDetector:3.8'
 
     implementation 'org.jsoup:jsoup:1.16.2'
     implementation 'com.konghq:unirest-java:3.14.5'