Fix triangle.wgsl's floating point literals.

Bug: None
Change-Id: I76a4df338e6354915844822ac1d40cece10ac9e0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/27241
Commit-Queue: dan sinclair <dsinclair@chromium.org>
Reviewed-by: dan sinclair <dsinclair@chromium.org>
diff --git a/test/triangle.wgsl b/test/triangle.wgsl
index 6eb9ed7..d833e83 100644
--- a/test/triangle.wgsl
+++ b/test/triangle.wgsl
@@ -30,7 +30,7 @@
 # Fragment shader
 [[location 0]] var<out> outColor : vec4<f32>;
 fn frag_main() -> void {
-  outColor = vec4<f32>(1, 0, 0, 1);
+  outColor = vec4<f32>(1.0, 0.0, 0.0, 1.0);
   return;
 }
 entry_point fragment = frag_main;