Bump logback.test from 1.5.18 to 1.5.20

Bumps `logback.test` from 1.5.18 to 1.5.20.

Updates `ch.qos.logback:logback-core` from 1.5.18 to 1.5.20
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.18...v_1.5.20)

Updates `ch.qos.logback:logback-classic` from 1.5.18 to 1.5.20
- [Release notes](https://github.com/qos-ch/logback/releases)
- [Commits](qos-ch/logback@v_1.5.18...v_1.5.20)

---
updated-dependencies:
- dependency-name: ch.qos.logback:logback-core
  dependency-version: 1.5.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
- dependency-name: ch.qos.logback:logback-classic
  dependency-version: 1.5.20
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -38,7 +38,7 @@
         <jodatime>2.14.0</jodatime>
         <lombok>1.18.38</lombok>
         <awaitility>4.3.0</awaitility>
-        <logback.test>1.5.18</logback.test>
+        <logback.test>1.5.20</logback.test>
         <hibernate.validator>9.0.1.Final</hibernate.validator>
         <netty.version>4.2.2.Final</netty.version>
         <kryo.version>5.6.2</kryo.version>