Bump Logback version to 1.5.20.

Author: mp911de

pom.xml

@@ -40,7 +40,7 @@
         <junit.version>5.13.4</junit.version>
         <jmh.version>1.37</jmh.version>
         <mbr.version>0.6.0.RELEASE</mbr.version>
-        <logback.version>1.3.14</logback.version>
+        <logback.version>1.5.20</logback.version>
         <mockito.version>4.11.0</mockito.version>
         <netty.version>4.1.127.Final</netty.version>
         <postgresql.version>42.7.2</postgresql.version>