docs(TSP-1323): add workforce_task_deleted audit log event - #695

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

- enterprise/streaming-events.mdx

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enterprise/streaming-events.mdx:
	- 21:42      Did you really mean 'Databricks'?
	- 487:42     Did you really mean 'llm_completion'?
	- 487:141    Did you really mean 'llm_completion'?
	- 487:184    Did you really mean 'llm_completion'?
	- 507:67     Did you really mean 'arrayValue'?
	- 507:107    Did you really mean 'stringValue'?


Found 6 suggested changes across 1 files in 464.74ms