chore(deps): Bump de.siegmar:logback-gelf from 5.0.1 to 6.0.0 (#1127)

Bumps [de.siegmar:logback-gelf](https://github.com/osiegmar/logback-gelf) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/osiegmar/logback-gelf/releases)
- [Changelog](https://github.com/osiegmar/logback-gelf/blob/master/CHANGELOG.md)
- [Upgrade guide](https://github.com/osiegmar/logback-gelf/blob/master/UPGRADE.md)
- [Commits](osiegmar/logback-gelf@v5.0.1...v6.0.0)

---
updated-dependencies:
- dependency-name: de.siegmar:logback-gelf
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -73,7 +73,7 @@ subprojects {
 
         annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
 
-        runtimeOnly("de.siegmar:logback-gelf:5.0.1")
+        runtimeOnly("de.siegmar:logback-gelf:6.0.0")
         runtimeOnly("io.micrometer:micrometer-registry-prometheus")
 
         testImplementation("org.springframework.boot:spring-boot-starter-test") {