Update Documentation to be compatible with Beta2

this one took a while

docs/guides/samples/groups.cs

@@ -1,15 +1,15 @@
-[Module("admin")]
-public class AdminModule
+[Group("admin")]
+public class AdminModule : ModuleBase
 {
     [Group("mod")]
-    public class ModerationGroup
+    public class ModerationGroup : ModuleBase
     {
         // ~admin mod ban foxbot#0282
         [Command("ban")]
-        public async Task Ban(IUserMessage msg, IGuildUser user) { }
+        public async Task Ban(IGuildUser user) { }
     }
 
     // ~admin clean 100
     [Command("clean")]
-    public async Task Clean(IUserMessage msg, int count = 100) { }
+    public async Task Clean(int count = 100) { }
 }