Bump ch.qos.logback:logback-classic from 1.5.1 to 1.5.6

Bumps [ch.qos.logback:logback-classic](https://github.com/qos-ch/logback) from 1.5.1 to 1.5.6.
- [Commits](qos-ch/logback@v_1.5.1...v_1.5.6)

---
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]>

pom.xml

@@ -399,7 +399,7 @@
     <dependency>
       <groupId>ch.qos.logback</groupId>
       <artifactId>logback-classic</artifactId>
-      <version>1.5.1</version>
+      <version>1.5.6</version>
     </dependency>
     <dependency>
       <groupId>javax.xml.bind</groupId>