Spelling update (#214)

- Update spelling mistake in the Swift sample app

Author: Br1an-Boyle

Examples/Sample-Swift/Sample-Swift/AppDelegate.swift

@@ -10,15 +10,15 @@ import UIKit
 import Intercom
 
 let INTERCOM_APP_ID = "<#YOUR APP ID#>"
-let INETERCOM_API_KEY = "<#YOUR API KEY#>"
+let INTERCOM_API_KEY = "<#YOUR API KEY#>"
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
 
     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
-        Intercom.setApiKey(INETERCOM_API_KEY, forAppId: INTERCOM_APP_ID)
+        Intercom.setApiKey(INTERCOM_API_KEY, forAppId: INTERCOM_APP_ID)
         Intercom.setLauncherVisible(true)
 
         #if DEBUG