Bump logbackVersion from 1.5.3 to 1.5.6

Bumps `logbackVersion` from 1.5.3 to 1.5.6.

Updates `ch.qos.logback:logback-classic` from 1.5.3 to 1.5.6
- [Commits](qos-ch/logback@v_1.5.3...v_1.5.6)

Updates `ch.qos.logback:logback-core` from 1.5.3 to 1.5.6
- [Commits](qos-ch/logback@v_1.5.3...v_1.5.6)

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

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

bom/build.gradle

@@ -71,7 +71,7 @@ ext {
     jwtJacksonVersion = '0.11.5'
     kafkaVersion = '3.7.0'
     lang3Version = '3.14.0'
-    logbackVersion = '1.5.3'
+    logbackVersion = '1.5.6'
     lettuceVersion = '6.3.1.RELEASE'
     // TODO: Version 9 now available
     luceneVersion = '8.11.2'