deps: update logback.version to v1.5.6

Author: renovate-bot

pom.xml

@@ -14,7 +14,7 @@
   </description>
 
   <properties>
-    <logback.version>1.2.13</logback.version>
+    <logback.version>1.5.6</logback.version>
     <easymock.version>5.2.0</easymock.version>
     <truth.version>1.4.2</truth.version>
     <logging.version>3.17.0</logging.version>