Spelling mistake fix

Author: Istiakmorsalin

README.md

@@ -6,7 +6,7 @@ You can do this by:
 - opening an issue to discuss the current solution, ask a question, propose your solution etc. (also English is not my native language so if you think that something can be corrected please open a PR 😊)
 - opening a PR if you want to fix bugs or improve something
 
-### Instalation
+### Installation
 
 Dependencies in this project are provided via Cocoapods. Please install all dependecies with