Update ch.qos.logback dependency version to latest (#687)

In order to fix the CVE-2023-6378 vulnerability, update ch.qos.logback maven dependency version to 1.5.6

pom.xml

@@ -47,7 +47,7 @@
     </scm>
     <properties>
         <aopalliance.version>1.0</aopalliance.version>
-        <ch.qos.logback.version>1.4.11</ch.qos.logback.version>
+        <ch.qos.logback.version>1.5.6</ch.qos.logback.version>
         <com.auth0.jwks-rsa.version>0.22.1</com.auth0.jwks-rsa.version>
         <com.fasterxml.jackson.version>2.15.2</com.fasterxml.jackson.version>
         <com.github.kirviq.dumbster.version>1.7.1</com.github.kirviq.dumbster.version>