AMP-84095 add description of Braze User Alias Label

[sina-jamshidi]

Amplitude Developer Docs PR

Requested by NBA and RBI to be able to customize their user alias label so that it matches up with their alias cohort sync label

Description

Description added for new field in Braze event streaming

Deadline

When do these changes need to be live on the site? By EOD when corresponding code changes are merged

Change type

• [ ] Doc bug fix. Fixes #[insert issue number]. Amplitude contributors include Jira issue number.
• [X] Doc update.
• [ ] New documentation.
• [ ] Non-documentation related fix or update.

PR checklist:

• [X] My documentation follows the style guidelines of this project.
• [ ] I previewed my documentation on a local server using mkdocs serve.
• [ ] Running mkdocs serve didn't generate any failures.
• [X] I have performed a self-review of my own documentation.

@amplitude-dev-docs

[github-actions[bot]]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ MARKDOWN	markdownlint	3		0	0.32s

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[sina-jamshidi]

Hmm looks like spell check is not failing for my changes, it's due to formatguide.md

[markzegarelli]

@sina-jamshidi Ah, yes, sorry about that. I just added that this morning.

Let me update those so they aren't checked. If this is ready to go, (I just approved it), I can also force push to get around it.

Hmm looks like spell check is not failing for my changes, it's due to formatguide.md