docs/tint: Update origin trial changes for abstract-numerics

Bug: tint:1504
Change-Id: I2807051c1e0abd170607e2786eb9295f7b9d7e4f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/93240
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/docs/tint/origin-trial-changes.md b/docs/tint/origin-trial-changes.md
index 85a12ef..08f651f 100644
--- a/docs/tint/origin-trial-changes.md
+++ b/docs/tint/origin-trial-changes.md
@@ -9,6 +9,9 @@
 
 ## Changes for M104
 
+### New features
+
+* Tint now supports abstract-numerics, removing the need to always suffix unsigned integers with `u` [tint:1504](crbug.com/tint/1504)
 * Parsing of `@compute`, `@fragment` and `@vertex` added.
 
 ## Changes for M103
@@ -20,6 +23,7 @@
 * Matrix identity constructors and constructors for a single scalar value are now supported [tint:1545](crbug.com/tint/1545)
 
 ### Breaking changes
+
 * Builtin `atomicCompareExchangeWeak` returns a struct instead of a vec2. [tint:1185](crbug.com/tint/1185)
 
 ## Changes for M102