Fix typo

Author: Foso

Targeting iOS and Android with Kotlin Multiplatform/01_Introduction.md

@@ -1,5 +1,5 @@
 # Introduction
 
-This tutorial has been moved to the [Kotlin Multiplatform Mobile Documentain Portal](https://kotlinlang.org/docs/mobile/create-first-app.html)
+This tutorial has been moved to the [Kotlin Multiplatform Mobile Documentation Portal](https://kotlinlang.org/docs/mobile/create-first-app.html)
 
 For more advanced training visit [Networking and Data storage with KMM hands-on](https://play.kotlinlang.org/hands-on/Networking%20and%20Data%20Storage%20with%20Kotlin%20Multiplatfrom%20Mobile/) to learn how to create a mobile application for Android and iOS with a shared business logic modile using Ktor and SQLDelight.