message: docs(defaultClasses): update "Base" description
diff: @@ -26,13 +26,12 @@ And also applies the following `schemaOptions`:
  ### Base
  -The Base Class provides the following fields:
  +The Base *Interface* provides the following fields:
  | Field Name | Type |
  -| :--------: | :---------------------------: |
  +| :--------: | :-----------------------: |
  | `_id` | `mongoose.Types.ObjectId` |
  -| `__v` | `number` |
  -| `__t` | undefined \| string \| number | <!--This has to not be a inline-block, because docusaurus does not like " | "--> |
  +| `id` | `string` |
  How to override `_id` type:
  <sub>This only works with typegoose 6.0.2+</sub>
  