fix readme grammar

Author: GreatGrant

README.md

@@ -3,7 +3,7 @@
 ## Main(MVVM), MVI Branch Both
 - Multi Module Clean Architecture with Hilt
 - Http Client with Retrofit and Ktor Client
-- Cahcing with Room
+- Caching with Room
 - Unit Testing with JUnit4 and Mockito and Robolectric
 - Instrumentation Testing with Espresso
 - Sharing versions with Version Catalog