Bump ch.qos.logback:logback-classic from 1.5.20 to 1.5.21

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.5.20 to 1.5.21.
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.20...v_1.5.21)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-classic
  dependency-version: 1.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle

@@ -49,7 +49,7 @@ ext {
 	junitJupiterVersion = '5.11.4'
 	kotlinCoroutinesVersion = '1.8.1'
 	log4jVersion = '2.24.3'
-	logbackVersion = '1.5.20'
+	logbackVersion = '1.5.21'
 	micrometerDocsVersion = '1.0.4'
 	micrometerVersion = '1.14.13'
 	micrometerTracingVersion = '1.4.12'