message: docs(ref): change internal link to be relative
diff: @@ -7,7 +7,7 @@ The Type `Ref<Class, IDType>` is the type used for [References](https://mongoose
  The `Class` generic-parameter is used to set the class that is being referenced.
  The `IDType` generic-parameter is used to set the `_id` type of the referenced class (Default: `mongoose.Types.ObjectId`).
  -There are [typeguards](api/functions/typeguards/isDocument.md) to check if a Reference is populated.
  +There are [typeguards](../functions/typeguards/isDocument.md) to check if a Reference is populated.
  For an more written out guide, there is the [Reference Other Classes](../../guides/advanced/reference-other-classes.md) Guide.
  