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] <[email protected]>

build.gradle

@@ -68,7 +68,7 @@ subprojects {
         jlayerVersion = "1.0.1.4"
         junitJupiterVersion = "5.11.3"
         junitPlatformLauncherVersion = "1.11.3"
-        logbackClassicVersion = "1.5.12"
+        logbackClassicVersion = "1.5.15"
         mockitoVersion = "5.14.2"
         openFeignVersion = "13.3"
         snakeYamlVersion = "2.8"