Update dependency ch.qos.logback:logback-classic to v1.5.21 (#5910)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pom.xml

@@ -269,7 +269,7 @@
       <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-classic</artifactId>
-        <version>1.5.20</version>
+        <version>1.5.21</version>
         <scope>test</scope>
       </dependency>
       <dependency>