[torque] add "struct" keyword to VS Code plugin

TBR: szuend@chromium.org

Change-Id: Ifef721eecab79dbcfb306dd241b3476fc1b6ec56
Reviewed-on: https://chromium-review.googlesource.com/c/1424952Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58971}

tools/torque/vscode-torque/syntaxes/torque.tmLanguage.json

@@ -65,7 +65,7 @@
 			},
 			{
 				"name": "keyword.other.torque",
-				"match": "\\b(constexpr|module|macro|builtin|runtime|intrinsic|javascript|implicit|deferred|label|labels|tail|let|generates|type|class|weak|extends|extern|const|typeswitch|case|transient|transitioning)\\b"
+				"match": "\\b(constexpr|module|macro|builtin|runtime|intrinsic|javascript|implicit|deferred|label|labels|tail|let|generates|type|struct|class|weak|extends|extern|const|typeswitch|case|transient|transitioning)\\b"
 			},
 			{
 				"name": "keyword.operator.torque",