message: docs(defaultClasses): update outdated "Base" documentation
diff: @@ -37,7 +37,9 @@ How to override `_id` type:
  <sub>This only works with typegoose 6.0.2+</sub>
  ```ts
  -class Something extends Base<mongoose.Schema.Type.String> {} // _id is now of type "String" (from mongoose)
  +interface Something extends Base {} // have the interface to add the types of "Base" to the class
  +class Something {} // have your class, OR
  +class Something extends TimeStamps {} // have your class extend some other class
  ```
  ### FindOrCreate
  