Add non-struct buffer types to the release notes

Fixed: tint:1372
Change-Id: I394c33eb80ea1ce347794bc63965f6080ca92c61
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/76165
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

docs/origin-trial-changes.md

diff --git a/docs/origin-trial-changes.md b/docs/origin-trial-changes.md
index 61c4e3c..cf4e668 100644
--- a/docs/origin-trial-changes.md
+++ b/docs/origin-trial-changes.md
@@ -18,6 +18,7 @@
 * Vector and matrix element type can now be inferred from constructor argument types. [tint:1334](https://crbug.com/tint/1334)
 * Added builtins `degrees()` and `radians()` for converting between degrees and radians. [tint:1329](https://crbug.com/tint/1329)
 * `let` arrays and matrices can now be dynamically indexed. [tint:1352](https://crbug.com/tint/1352)
+* Storage and Uniform buffer types no longer have to be structures. [tint:1372](crbug.com/tint/1372)
 
 ### Fixes