Fix typo

Author: mhegazy

pages/Generics.md

@@ -270,7 +270,7 @@ loggingIdentity({length: 10, value: 3});
 
 You can declare a type parameter that is constrained by another type parameter.
 For example, here we'd like to get a property from an object given its name.
-We'd like to ensure that we're not accidentally grapping a property that does not exist on the `obj`, so we'll place a constraint between the two types:
+We'd like to ensure that we're not accidentally grabbing a property that does not exist on the `obj`, so we'll place a constraint between the two types:
 
 ```ts
 function getProperty<T, K extends keyof T>(obj: T, key: K) {