Update advanced-topics.mdx

Author: lizhennessy

docs/source/caching/advanced-topics.mdx

@@ -116,7 +116,7 @@ function Foo (){
 export default Foo;
 ```
 
-## TypePolicy inheritence
+## TypePolicy inheritance
 
 JavaScript developers will be familiar with the idea of [inheritance](https://en.m.wikipedia.org/wiki/Inheritance_(object-oriented_programming)) from the `extends` clause of `class` declarations, or possibly from dealing with prototype chains created by `Object.create`.