[8.16] Remove known issue for AI Assistant from the 8.15.1-8.16.1 release notes (backport #6190) (#6199)

* Remove known issue for AI Assistant from the 8.15.1-8.16.1 release notes (#6190)

* First draft

* Removes extra image

(cherry picked from commit b1dec23)

* Fixes title

---------

Co-authored-by: Nastasha Solomon <[email protected]>
Co-authored-by: nastasha.solomon <[email protected]>
(cherry picked from commit 08f63b1)

Author: mergify[bot]

docs/release-notes/8.16.asciidoc

@@ -31,6 +31,32 @@ On November 12, 2024, it was discovered that manually running a custom query rul
 [[release-notes-8.16.1]]
 === 8.16.1
 
+[discrete]
+[[known-issue-8.16.1]]
+==== Known issues
+
+// tag::known-issue[]
+[discrete]
+.Duplicate alerts can be produced from manually running threshold rules 
+[%collapsible]
+====
+*Details* +
+On November 12, 2024, it was discovered that manually running threshold rules could produce duplicate alerts if the date range was already covered by a scheduled rule execution.
+
+====
+// end::known-issue[]
+
+// tag::known-issue[]
+[discrete]
+.Manually running custom query rules with suppression could suppress more alerts than expected
+[%collapsible]
+====
+*Details* +
+On November 12, 2024, it was discovered that manually running a custom query rule with suppression could incorrectly inflate the number of suppressed alerts. 
+
+====
+// end::known-issue[]
+
 [discrete]
 [[bug-fixes-8.16.1]]
 ==== Bug fixes