fix(deps): update dependency net.dv8tion:jda to v5.6.1

Author: renovate[bot]

Backend/pom.xml

@@ -75,7 +75,7 @@
         <dependency>
             <groupId>net.dv8tion</groupId>
             <artifactId>JDA</artifactId>
-            <version>5.2.3</version>
+            <version>5.6.1</version>
             <exclusions>
                 <exclusion>
                     <groupId>club.minnced</groupId>