fix(deps): update logback.version to v1.5.6

Author: renovate[bot]

pom.xml

@@ -66,7 +66,7 @@
         <jetty.version>11.0.20</jetty.version>
         <junit.version>4.13.2</junit.version>
         <junit-jupiter.version>5.10.2</junit-jupiter.version>
-        <logback.version>1.5.5</logback.version>
+        <logback.version>1.5.6</logback.version>
         <logback-json.version>0.1.5</logback-json.version>
         <mockito.version>5.11.0</mockito.version>
         <mockito-inline.version>5.2.0</mockito-inline.version>