[Known issue][Detection Engine][8.16.0 & 8.16.1] Exception item comment validation on newline chars

[nastasha-solomon]

Partially addresses #6275 by updating the 8.16.0 and 8.16.1 release notes. This will be doc'd as a known issue for 8.17 in #6224.

Preview: 8.16.x release notes

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[rylnd]

@nastasha-solomon I had a few suggestions; they apply to both sections but I didn't duplicate the suggested changes. Let me know if you have any questions.

[rylnd]

Thank you for adding markup, links, and much-needed grammar here! LGTM.

[yctercero]

Not sure how we usually document curl requests, do we need to specify that they need to also include the space? If not, ignore.

Suggested change

	curl -XPOST -H 'Authorization: ApiKey API_KEY_HERE' -H 'kbn-xsrf: true' -H 'elastic-api-version: 2023-10-31' 'KIBANA_URL/api/exception_lists/_export?list_id=f75aae6f-0229-413f-881d-81cb3abfbe2d&id=490525a2-eb66-4320-95b5-88bdd1302dc4&namespace_type=single' -o list.ndjson
	curl -XPOST -H 'Authorization: ApiKey API_KEY_HERE' -H 'kbn-xsrf: true' -H 'elastic-api-version: 2023-10-31' '${KIBANA_URL}${SPACE_URL}/api/exception_lists/_export?list_id=f75aae6f-0229-413f-881d-81cb3abfbe2d&id=490525a2-eb66-4320-95b5-88bdd1302dc4&namespace_type=single' -o list.ndjson

[nastasha-solomon]

Good question, I'm not sure. Do users still need to specify the space if they're using the default one?

[yctercero]

I don't believe so, think just if they need to hit a different space. Might be worth just noting somewhere though to make sure to include space if other than default?

[yctercero]

Thank you, thank you! Left one minor comment.