Add slides for WASI-05-06

Author: lukewagner

meetings/2021/WASI-05-06.md

@@ -26,7 +26,7 @@ The meeting will be on a zoom.us video conference.
     1. Please help take notes.
     1. Thanks!
 1. Announcements
-    1. Meeting agendas and notes moving to the [WebAssembly/meetings repo](https://github.com/WebAssembly/meetings)
+    1. Meeting agendas and notes moving to the [WebAssembly/meetings repo](https://github.com/WebAssembly/meetings) ([slides](https://docs.google.com/presentation/d/19Xknjvlmy7WaGoJH496KikOHvdAO66zex_oW_TtLudg))
     2. _Sumbit a PR to add your announcement here_
 1. Proposals and discussions
     1. Presentation: Supporting alternative ABIs for blocking function calls (Luke Wagner)