add "detention" alias for probation

src/index.ts

@@ -243,7 +243,8 @@ client.on('message', async (message) => {
             }
 
             case 'unapprove':
-            case 'probation': {
+            case 'probation':
+            case 'detention': {
                 const users = await extractUsers(message, args);
                 if (!users?.length) return console.log('No users received');