Bump ch.qos.logback:logback-core from 1.5.5 to 1.5.6

Bumps [ch.qos.logback:logback-core](https://github.com/qos-ch/logback) from 1.5.5 to 1.5.6.
- [Commits](qos-ch/logback@v_1.5.5...v_1.5.6)

---
updated-dependencies:
- 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>

pom.xml

@@ -13,7 +13,7 @@
         <!-- required dependency versions -->
         <curator.version>5.6.0</curator.version>
         <logback-classic.version>1.5.6</logback-classic.version>
-        <logback-core.version>1.5.5</logback-core.version>
+        <logback-core.version>1.5.6</logback-core.version>
         <slf4j.verison>2.0.13</slf4j.verison>
         <zk.version>3.9.2</zk.version>