[Javascript] Doc output contains broken links to models for primitive types

Description

When I have a parameter that takes an array of Strings, the output documentation creates a broken link to String.md that does not exist, as though String was a model.

For example, the pet store example's GET /pet/findByTags method has this parameter:

"parameters": [
  {
    "name": "tags",
    "in": "query",
    "description": "Tags to filter by",
    "required": true,
    "type": "array",
    "items": {
      "type": "string"
    },
    "collectionFormat": "multi"
  }
],

When I generate with the Docker container swaggerapi/swagger-codegen-cli:2.4.5, I get this output in docs/PetApi.md:

### Parameters


Name | Type | Description
------------- | ------------- | -------------
 tags (required) | [[String]](String.md)| Tags to filter by 

That link to String.md is broken because String is not a model type.

This might be related to #7291.

Swagger-codegen version

Docker container swaggerapi/swagger-codegen-cli:2.4.5.

Swagger declaration file content or url

https://petstore.swagger.io/v2/swagger.json

Generate the petstore documentation with swaggerapi/swagger-codegen-cli:2.4.5 using the linked Swagger declaration, then inspect docs/PetApi.md for the tags parameter output. Trace the documentation generation path responsible for the [String] link; done means primitive array types no longer link to nonexistent model pages.