[ios] Use the right flag for filtered scans throttling

R=noemies@google.com

Change-Id: I3f5b09aea2d722083afcfd8d1c1f9b3756aeefa2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6000077
Reviewed-by: Noémie St-Onge <noemies@google.com>
Commit-Queue: Vincent Boisselle <vincb@google.com>
Cr-Commit-Position: refs/heads/main@{#1379774}

components/autofill/ios/browser/autofill_driver_ios.mm

@@ -338,7 +338,8 @@ void AutofillDriverIOS::FetchFromsFilteredByName(
     return;
   }
 
-  if (base::FeatureList::IsEnabled(kAutofillThrottleDocumentFormScanIos)) {
+  if (base::FeatureList::IsEnabled(
+          kAutofillThrottleFilteredDocumentFormScanIos)) {
     document_filtered_scan_batcher_.PushRequest(std::move(completion),
                                                 form_name);
   } else {