add iterator includes proposal

Author: michaelficarra

2026/03.md

@@ -111,7 +111,8 @@ When applicable, use these emoji as a prefix to the agenda item topic.
 
     | stage | timebox | topic | presenter |
     |:-----:|:-------:|-------|-----------|
-    | 2   | 5m  | Withdraw [Dynamic Import Host Adjustment](https://github.com/tc39/proposal-dynamic-import-host-adjustment) | Steve Hicks |
+    | 2 |  5m | Withdraw [Dynamic Import Host Adjustment](https://github.com/tc39/proposal-dynamic-import-host-adjustment) | Steve Hicks |
+    | 0 | 30m | [Iterator Includes](https://github.com/michaelficarra/proposal-iterator-includes) for Stage 1, 2, or 2.7 ([slides](https://docs.google.com/presentation/d/1a-1RQayP-tcJd2VAhFGoiL_dRT8gD8_qrp__qSgC1A4)) | Michael Ficarra |
 
 1. Longer or open-ended discussions