message: docs: fix typos in redoc-vendor-extensions.md
  [ci skip]
diff: @@ -132,13 +132,13 @@ Extends OpenAPI [Tag Object](http://swagger.io/specification/#tagObject)
  #### x-traitTag
  | Field Name | Type | Description |
  | :------------- | :------: | :---------- |
  -| x-traitTag | boolean | In Swagger two operations can have multiply tags. This property distinguish between tags that are used to group operations (default) from tags that are used to mark operation with certain trait (`true` value) |
  +| x-traitTag | boolean | In Swagger two operations can have multiple tags. This property distinguishes between tags that are used to group operations (default) from tags that are used to mark operation with certain trait (`true` value) |
  #### x-displayName
  | Field Name | Type | Description |
  | :------------- | :------: | :---------- |
  -| x-displayName | string | Define the text that is used for this tag in the menu and in section headings |
  +| x-displayName | string | Defines the text that is used for this tag in the menu and in section headings |
  ###### Usage in Redoc
  