fix(publish-post/twitter): Append link to text

[jnv]

Description

Fix twitter map for social-media/publish-post: Append link to text when publishing a tweet.

Motivation and Context

Refs #225

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have read the CONTRIBUTING document.
• [x] I haven't repeated the code. (DRY)
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[tmladek]

• [ ] I have added tests to cover my changes.

Are they going to be added?

[jnv]

• [ ] I have added tests to cover my changes.

Are they going to be added?

I'd need to re-record the whole publish-post suite, but it's due for refactoring anyway. So not in this PR, it's a quick fix.