[OpenAPI] How to add x-ballerina-init-description

[abeykoon]

info:
  x-ballerina-display:
    label: Bitbucket
    iconPath: "resources/bitbucket.svg"
  title: Bitbucket API
  description: >-
    This is a generated connector for [Bitbucket API v2.0](https://developer.atlassian.com/bitbucket/api/2/reference/) OpenAPI Specification.
    Code against the Bitbucket API to automate simple tasks, embed Bitbucket data into your own site, build mobile or desktop apps, 
    or even add custom UI add-ons into Bitbucket itself using the Connect framework.
  x-ballerina-init-description: >- 
    The connector initialization requires setting the API credentials.
    Create an [Bitbucket account](https://bitbucket.org/product/) and obtain tokens following 
    [this guide](https://developer.atlassian.com/bitbucket/api/2/reference/meta/authentication).