Fix a comment in BindGroupValidationTests.cpp

BUG=

Change-Id: Ice06ef17f40951493215a84ddcfef33521bf2656
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/14860
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Yunchao He <yunchao.he@intel.com>

src/tests/unittests/validation/BindGroupValidationTests.cpp

@@ -458,7 +458,7 @@ TEST_F(BindGroupValidationTest, ErrorLayout) {
     // Control case, creating with the good layout works
     utils::MakeBindGroup(device, goodLayout, {{0, mUBO, 0, 256}});
 
-    // Control case, creating with the good layout works
+    // Creating with an error layout fails
     ASSERT_DEVICE_ERROR(utils::MakeBindGroup(device, errorLayout, {{0, mUBO, 0, 256}}));
 }