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:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -28,7 +28,7 @@
     <hibernate.version>6.3.1.Final</hibernate.version>
     <hsqldb.version>2.7.4</hsqldb.version>
     <assertj>3.27.6</assertj>
-    <logback>1.5.20</logback>
+    <logback>1.5.21</logback>
     <junit.version>6.0.1</junit.version>
     <auto-service.version>1.1.1</auto-service.version>
     <git-code-format-maven-plugin.version>5.4</git-code-format-maven-plugin.version>