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

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

Author: dependabot[bot]

pom.xml

@@ -47,7 +47,7 @@
   <properties>
     <stream-client.version>1.4.0-SNAPSHOT</stream-client.version>
     <slf4j.version>2.0.17</slf4j.version>
-    <logback.version>1.5.20</logback.version>
+    <logback.version>1.5.21</logback.version>
     <netty.version>4.2.7.Final</netty.version>
     <netty-tcnative.version>2.0.74.Final</netty-tcnative.version>
     <metrics.version>4.2.37</metrics.version>