update link to welcome bot images

[reshamas]

PR Overview

Type of contribution

• Code
• Documentation

Reference: Issue or Pull Request (PR)

• Towards Update Welcome Bot #428

Description of Changes

<-- Brief description of the changes you made, files you touched, etc -->

Before and After for UI Updates

<-- You should have 2 images minimum, for desktop, 4 for mobile and desktop combined -->

Before:

After:

For PR Reviewer

• Does this file change the yarn.lock, package.json or package-lock.json file? If so, why?
• If this pr contains mobile and desktop changes, did you test on IphoneXr and desktop views?
• Does this file match the related tickets linked figma file, or does it pass the visual smell test?
• If this file contains javascript, does the javascript pass the smell test?
• If you don't feel super confident in your review, did you assign someone more senior to double check?