update doc

doc/QUESTIONS.md

@@ -31,7 +31,7 @@ the following code in your `AppDelegate`:
 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
   return [WXApi handleOpenURL:url delegate:[FluwxResponseHandler defaultManager]];
 }
-- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
+- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
 {
   return [WXApi handleOpenURL:url delegate:[FluwxResponseHandler defaultManager]];
 }
@@ -44,10 +44,10 @@ If you have to override these two functions,make sure you have called the `super
     
   return [super application:application openURL:url sourceApplication:sourceApplication annotation:annotation];
 }
-- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
+- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
 {
     
-  return [super application:app openURL:url options:options];
+  return [super application:application openURL:url options:options];
 }
 ```
 

doc/QUESTIONS_CN.md

@@ -59,7 +59,7 @@ iOS 9系统策略更新，限制了http协议的访问，此外应用需要在
 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url options:(NSDictionary<NSString*, id> *)options
 {
     
-  return [super application:app openURL:url options:options];
+  return [super application:application openURL:url options:options];
 }
 ```