Fixed typo in welcome screen

Assets/Data/DiscoverAsset.asset

   EnableShowAtStartup: 1
   PreferenceName: Discover
   Title: Welcome to the Boat Attack demo project!
-  Description: 'This demo makes use of the Universal Render Pipeline and is deisgned
+  Description: 'This demo makes use of the Universal Render Pipeline and is designed
     to showcase and display examples of how to use some of the features included
     with Universal RP and other exciting features available in Unity.