Allow additional content after the sortable fields in the sorters description.

[colin-mckibben-sp]

Before this fix, the following description for sorters would cause a linter error due to additional text at the end of the description.

- in: query
      name: sorters
      schema:
        type: string
        format: comma-separated
      required: false
      description: >-
        Sort results using the standard syntax described in [V3 API Standard Collection Parameters](https://developer.sailpoint.com/idn/api/standard-collection-parameters#sorting-results)


        Sorting is supported for the following fields: **name, created**


        The default sorter is `name`.

This commit will allow additional text after the first two lines so we can provide more context about sorters.