LibJS: Convert CanonicalNumericIndexString to use NumberToString

Author: https://github.com/trflynn89
Commit: 36d72a7f4c
Pull-request: https://github.com/SerenityOS/serenity/pull/17461
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibJS/Runtime/PrimitiveString.cpp

@@ -144,7 +144,7 @@ ThrowCompletionOr<Optional<Value>> PrimitiveString::get(VM& vm, PropertyKey cons
             return Value(static_cast<double>(length));
         }
     }
-    auto index = canonical_numeric_index_string(property_key, CanonicalIndexMode::IgnoreNumericRoundtrip);
+    auto index = MUST_OR_THROW_OOM(canonical_numeric_index_string(vm, property_key, CanonicalIndexMode::IgnoreNumericRoundtrip));
     if (!index.is_index())
         return Optional<Value> {};
     auto str = TRY(utf16_string_view());