update README files

src/app/components/ATIAnalytics/README.md

@@ -8,15 +8,15 @@ There is a custom hook within Simorgh that handles logging click events.
 
 - [useClickTrackerHandler](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useClickTrackerHandler/index.jsx) is a custom hook that returns a click event handler that you can assign to the `onClick` attribute of the DOM element you'd like to click track.
 
-You can find instructions and examples on how to set up and use this custom hook [here](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useClickTrackerHandler/README.md).
+You can find instructions and examples on how to set up and use this custom hook [here](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useClickTrackerHandler/README.mdx).
 
 ## Logging View Events
 
 There is a custom hook within Simorgh that handles logging view events.
 
 - [useViewTracker](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useViewTracker/index.jsx) is a custom hook that returns a `ref` that you can assign to DOM elements you'd like to view track.
 
-You can find instructions and examples on how to set up and use this custom hook [here](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useViewTracker/README.md).
+You can find instructions and examples on how to set up and use this custom hook [here](https://github.com/bbc/simorgh/blob/latest/src/app/hooks/useViewTracker/README.mdx).
 
 ## Tag Inspector