RELEASES: add notes describing #10016 and #10036 (#10104)

Author: pchickey

RELEASES.md

@@ -4,8 +4,25 @@ Unreleased.
 
 ### Added
 
+* New `wasmtime-wasi-io` crate provides a `#![no_std]` wasi:io implementation,
+  factored out of `wasmtime-wasi`. Users of `wasmtime-wasi` don't have to
+  depend on this new crate.
+  [#10036](https://github.com/bytecodealliance/wasmtime/pull/10036)
+
 ### Changed
 
+* `wasmtime-wasi` split the `WasiView` trait into `IoView` and `WasiView`, and
+  `wasmtime-wasi-http` re-uses `IoView` in `WasiHttpView`. Details on porting
+  for embedders in PR.
+  [#10016](https://github.com/bytecodealliance/wasmtime/pull/10016)
+
+* `wasmtime-wasi` renamed some exported types and traits. Embedders which use 
+  `Pollable`, `InputStream`, `OutputStream`, `Subscribe`, `HostInputStream`,
+  `HostOutputStream`, `PollableFuture`, or `ClosureFuture` from that crate
+  will need to rename those imports to their new names, describe in PR.
+  [#10036](https://github.com/bytecodealliance/wasmtime/pull/10036)
+
+
 --------------------------------------------------------------------------------
 
 Release notes for previous releases of Wasmtime can be found on the respective