fixup! src: replace custom ASCII validation with simutf one

Co-authored-by: Tobias Nießen <[email protected]>

Author: addaleax

src/string_bytes.cc

@@ -582,7 +582,7 @@ MaybeLocal<Value> StringBytes::Encode(Isolate* isolate,
 
     case ASCII:
       if (simdutf::validate_ascii_with_errors(buf, buflen).error) {
-        // The input contains non-ASCII bytes
+        // The input contains non-ASCII bytes.
         char* out = node::UncheckedMalloc(buflen);
         if (out == nullptr) {
           *error = node::ERR_MEMORY_ALLOCATION_FAILED(isolate);