Update dependency net.dv8tion:JDA to v6

pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>net.dv8tion</groupId>
             <artifactId>JDA</artifactId>
-            <version>5.6.1</version>
+            <version>6.1.1</version>
         </dependency>
         <!-- JDA depends on SLF4J for logging -->
         <dependency>
@@ -91,7 +91,7 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter-api</artifactId>
-            <version>6.0.1</version>
+            <version>5.14.1</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -143,13 +143,13 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>3.12.0</version>
+                <version>3.11.2</version>
             </plugin>
 
             <plugin>
                 <groupId>org.sonarsource.scanner.maven</groupId>
                 <artifactId>sonar-maven-plugin</artifactId>
-                <version>5.2.0.4988</version>
+                <version>5.1.0.4751</version>
             </plugin>
 
             <plugin>