API refresh - #6092

Running Vale across on the following files affected by this PR:

- api/assistant/create-assistant-message-v2.mdx
- api/assistant/create-assistant-message.mdx
- api/assistant/get-page-content.mdx
- api/assistant/search.mdx
- api/introduction.mdx

Attempting to initialize Vale linter...
Customer vale configuration detected. Attempting to sync packages...
Packages synced successfully.
Attempting to run Vale spellcheck...
Vale spellcheck completed successfully.

api/assistant/create-assistant-message-v2.mdx:
	- 3:29    Use 'JSON' instead of 'json'.

api/assistant/create-assistant-message.mdx:
	- 3:29    Use 'JSON' instead of 'json'.

api/introduction.mdx:
	- 12:10    Use 'endpoints?' instead of 'Endpoints'.
	- 41:28    Don't put a space before or after a dash.
	- 42:24    Don't put a space before or after a dash.
	- 43:26    Don't put a space before or after a dash.
	- 43:85    In general, use active voice instead of passive voice ('are opened').
	- 44:26    Don't put a space before or after a dash.
	- 45:27    Don't put a space before or after a dash.
	- 46:23    Don't put a space before or after a dash.


Found 10 suggested changes across 3 files in 1201.11ms