Bump ch.qos.logback:logback-core from 1.5.20 to 1.5.21

Bumps [ch.qos.logback:logback-core](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-core
  dependency-version: 1.5.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

pom.xml

@@ -165,7 +165,7 @@
 			<dependency>
 				<groupId>ch.qos.logback</groupId>
 				<artifactId>logback-core</artifactId>
-				<version>1.5.20</version>
+				<version>1.5.21</version>
 				<scope>test</scope>
 			</dependency>
 			<dependency>