README language tweak

Author: weaverryan

README.md

@@ -292,7 +292,7 @@ Uncaught (in promise) TypeError: class constructors must be invoked with 'new'
 ```
 
 The error is caused when an ES5 class tries to "extend" an ES6 class. If the target is not correctly set, 
-TypeScript would transpiling the controller to old ES5 code. But Stimulus 3 uses pure ES6 classes. 
+TypeScript will transpile the controller to old ES5 code. But Stimulus 3 uses pure ES6 classes. 
 This causes an incompatibility, hence the need to target ES6 explicitly.
 
 ## Run tests