DDI-362: Adds changelog and all the fixins'

[caseyamp]

Amplitude Developer Docs PR

Adds a docs changelog

Deadline

When do these changes need to be live on the site?
Whenever

Change type

• Non-documentation related fix or update.

PR checklist:

• 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.
• I have performed a self-review of my own documentation.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ MARKDOWN	markdownlint	1		0	0.25s
✅ MARKDOWN	markdown-link-check	1		0	10.36s

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