Rename arg name --time-out-ms for rwt

Change this to --timeout-ms to align with other parameter names,
e.g. --exit-after-n-crashes-or-timeouts, --skip-timeouts,
--initialize-webgpu-adapter-at-startup-timeout-ms.

Bug: 1095123
Change-Id: I9bdf511efeeef9eaf4b00dbba958e921f7d13834
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3457544
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Weizhong Xia <weizhong@google.com>
diff --git a/scripts/npm_test.js b/scripts/npm_test.js
index c4175ba..a0fcfd5 100644
--- a/scripts/npm_test.js
+++ b/scripts/npm_test.js
@@ -91,7 +91,7 @@
 
   if (IS_DEBUG_ENABLED) {
     testArgs.push('--additional-driver-flag=--remote-debugging-port=9222');
-    testArgs.push('--time-out-ms=6000000');
+    testArgs.push('--timeout-ms=6000000');
     console.log('\n=============================================');
     const unitTest = testArgs.find(arg => arg.includes('http/tests/devtools/unit/'));
     if (unitTest) {