squash: Update README.md

Co-authored-by: Markus Siglreithmaier <[email protected]>

README.md

@@ -138,7 +138,7 @@ crate-type = ["cdylib"]
 
 All Android applications are based on an `Activity` subclass and the
 `android-activity` crate is designed to support different choices for this base
-class. You application must specify the base class it needs via a feature flag:
+class. Your application _must_ specify the base class it needs via a feature flag:
 
 | Base Class       | Feature Flag      |  Notes  |
 | :--------------: | :---------------: | :-----: |