Bump ch.qos.logback:logback-classic from 1.5.12 to 1.5.15

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.5.12 to 1.5.15.
- [Commits](qos-ch/logback@v_1.5.12...v_1.5.15)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ junit = "5.11.3"
 roaster = "2.22.3.Final" # last using jdk8
 handlebars = "4.3.1"
 picocli = "4.7.6"
-logback = "1.5.12"
+logback = "1.5.15"
 slf4j = "1.7.36"
 assertj = "3.26.3"
 mockito = "5.5.0"