Update installation guide after renaming iOS class

Author: dluksza

README.md

@@ -99,7 +99,7 @@ public class MainApplication extends Application implements ReactApplication {
 1. In XCode, in the project navigator, right click `Libraries` ➜ `Add Files to [your project's name]`
 2. Go to `node_modules` ➜ `react-native-splash-screen` and add `SplashScreen.xcodeproj`
 3. In XCode, in the project navigator, select your project. Add `libSplashScreen.a` to your project's `Build Phases` ➜ `Link Binary With Libraries`
-4. To fix `'SplashScreen.h' file not found`, you have to select your project → Build Settings → Search Paths → Header Search Paths to add:
+4. To fix `'RNSplashScreen.h' file not found`, you have to select your project → Build Settings → Search Paths → Header Search Paths to add:
 
    `$(SRCROOT)/../node_modules/react-native-splash-screen/ios`
 
@@ -139,15 +139,15 @@ Update `AppDelegate.m` with the following additions:
 
 #import <React/RCTBundleURLProvider.h>
 #import <React/RCTRootView.h>
-#import "SplashScreen.h"  // here
+#import "RNSplashScreen.h"  // here
 
 @implementation AppDelegate
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
     // ...other code
 
-    [SplashScreen show];  // here
+    [RNSplashScreen show];  // here
     return YES;
 }