Bump logback.version from 1.5.19 to 1.5.21

Bumps `logback.version` from 1.5.19 to 1.5.21.

Updates `ch.qos.logback:logback-classic` from 1.5.19 to 1.5.21
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.19...v_1.5.21)

Updates `ch.qos.logback:logback-core` from 1.5.19 to 1.5.21
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.19...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
- dependency-name: ch.qos.logback:logback-core
  dependency-version: 1.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

super/pom.xml

@@ -107,7 +107,7 @@ SPDX-License-Identifier: Apache-2.0
     <fmt-maven-plugin.version>2.29</fmt-maven-plugin.version>
     <apache.activemq.version>6.1.6</apache.activemq.version>
     <apache.commons.schema>2.3.2</apache.commons.schema>
-    <logback.version>1.5.19</logback.version>
+    <logback.version>1.5.21</logback.version>
     <maven.clean.plugin.version>3.5.0</maven.clean.plugin.version>
     <maven.compiler.plugin.version>3.13.0</maven.compiler.plugin.version>
     <openmuc.jdlms.version>1.8.0</openmuc.jdlms.version>