add Array.fromAsync behavior change item

Author: bakkot

2025/04.md

@@ -113,6 +113,7 @@ When applicable, use these emoji as a prefix to the agenda item topic.
 
     | stage | timebox | topic | presenter |
     |:-----:|:-------:|-------|-----------|
+    |   3   | 10m      | [Note about changed behavior of Array.fromAsync](https://github.com/tc39/proposal-array-from-async/issues/39#issuecomment-1526744932) after landing [#2600](https://github.com/tc39/ecma262/pull/2600) | Kevin Gibbons |
 
 1. Longer or open-ended discussions