Add agenda for 4-9

Author: mfreed7

meetings/telecon/2026-04-09.md

@@ -0,0 +1,5 @@
+Open UI Telecon Agenda, April 09, 2026
+===================================
+* Base appearance color input questions [#1425](https://github.com/openui/open-ui/issues/1425)
+* [combobox] supporting autocomplete use cases in aria practices guide [#1319](https://github.com/openui/open-ui/issues/1319)
+