Fix typos in docs (#6237)

Co-authored-by: Guy Carmeli <guyca@users.noreply.github.com>

website/docs/docs-Installing.mdx

@@ -20,7 +20,7 @@ Unlike most other libraries, react-native-navigation requires you to make a few
 
 in your project's root folder. Make sure to commit the changes introduced by the link script.
 
-If the link script completed successfully, you're good to go! If one of the steps failed, you'll need to complete the relevant step in the manual installation steps bellow.
+If the link script completed successfully, you're good to go! If one of the steps failed, you'll need to complete the relevant step in the manual installation steps below.
 
 ## Displaying the app root
 

website/docs/third-party-mobx.mdx

@@ -18,7 +18,7 @@ Also the example uses `mobx-react-lite` but you can use the normal `mobx-react`.
 
 ## Sharing a store between multiple screens
 
-In the example bellow we will be creating a small Counter app. We will learn how to integrate Mobx with React-Native-Navigation and demonstrate how updating the store from one component, triggers renders in other components connected to the same store.
+In the example below we will be creating a small Counter app. We will learn how to integrate Mobx with React-Native-Navigation and demonstrate how updating the store from one component, triggers renders in other components connected to the same store.
 
 Once you finish implementing the example, your screen should look similar to this:
 <img width="30%" src={useBaseUrl('/img/mobx_counter.png')} />