Fix a small typo in Format.cpp alwaus -> always

Bug: dawn:527
Change-Id: I8008dce9bfdfc3dc2782ce70d53eecec011d2316
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/30241
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>

src/dawn_native/Format.cpp

@@ -92,7 +92,7 @@ namespace dawn_native {
         ASSERT(HasOneBit(aspect));
         ASSERT(aspects & aspect);
 
-        // The stencil aspect is the only aspect that's not the first aspect. Since it is alwaus the
+        // The stencil aspect is the only aspect that's not the first aspect. Since it is always the
         // same aspect information, special case it to return a constant AspectInfo.
         if (aspect == Aspect::Stencil) {
             return kStencil8AspectInfo;