Add reserved words to the origin trial changes.

This CL updates the origin trial changes list to include the
deprecation of reserved words.

Bug: tint: 1463
Change-Id: I70aef6cdd68573413878d595928a7d92b40a275c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/98064
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: 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 84f6ba4..93c53e5 100644
--- a/docs/tint/origin-trial-changes.md
+++ b/docs/tint/origin-trial-changes.md
@@ -7,6 +7,10 @@
 * `array()` constructor can now infer type and count. [tint:1628](crbug.com/tint/1628)
 * `static_assert` statement has been added. [tint:1625](crbug.com/tint/1625)
 
+### Deprecated Features
+
+* The list of reserved words has been sync'd to the WGSL specification. [tint:1463](crbug.com/tint/1463)
+
 ## Changes for M105
 
 ### New features