Fix crash from setProperty in RCTTurboModule

Summary:
Changelog[Internal]:
[iOS][Fixed] - Fix crash from calling setProperty in RCTTurboModule

The crash is caused by passing a utf8 encoded string to a Object::setProperty overload which only allows ascii inputs.

Reviewed By: RSNara

Differential Revision: D43705999

fbshipit-source-id: b3f1b3fd27d43d40fe0a170d4c2e60faecc26dad

ReactCommon/react/nativemodule/core/platform/ios/ReactCommon/RCTTurboModule.mm

@@ -59,7 +59,7 @@ static jsi::Object convertNSDictionaryToJSIObject(jsi::Runtime &runtime, NSDicti
 {
   jsi::Object result = jsi::Object(runtime);
   for (NSString *k in value) {
-    result.setProperty(runtime, [k UTF8String], convertObjCObjectToJSIValue(runtime, value[k]));
+    result.setProperty(runtime, convertNSStringToJSIString(runtime, k), convertObjCObjectToJSIValue(runtime, value[k]));
   }
   return result;
 }