docs(model): correct syntax error in example code (#12137)

lib/model.js

@@ -2056,7 +2056,7 @@ class Model {
    *   include: [
    *      { model: Profile, required: true}
    *   ],
-   *   limit 3
+   *   limit: 3
    * });
    *
    * # Because the include for `Profile` has `required` set it will result in an inner join, and only the users who have a profile will be counted. If we remove `required` from the include, both users with and without profiles will be counted

types/lib/model.d.ts

@@ -1852,7 +1852,7 @@ export abstract class Model<T = any, T2 = any> extends Hooks {
    *   include: [
    *      { model: Profile, required: true}
    *   ],
-   *   limit 3
+   *   limit: 3
    * });
    * ```
    * Because the include for `Profile` has `required` set it will result in an inner join, and only the users