Add CTS DEPS as input for verify_gen_ts_dep_list action

Change-Id: Id8b2528054a32192227261d81643fd68352e5857
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87304
Reviewed-by: Loko Kung <lokokung@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>

third_party/gn/webgpu-cts/BUILD.gn

@@ -88,7 +88,7 @@ copy("copy_resources") {
 action("verify_gen_ts_dep_list") {
   script = "${dawn_root}/webgpu-cts/scripts/gen_ts_dep_lists.py"
   inputs = [
-    # TODO(kainino): Make sure this gets retriggered when the CTS dep changes.
+    "../../../DEPS",
     "resource_files.txt",
     "ts_sources.txt",
   ]