fix: typo in register-component.mdx (#130)

Author: tymakeswift

developer/reference/runtime/register-component.mdx

@@ -151,7 +151,7 @@ runtime.registerComponent(Cube, {
 
 ### Adding a description
 
-This example shows how to add an `Circle` component with a rich description. We
+This example shows how to add a `Circle` component with a rich description. We
 can define a description string using markdown formatting, and pass it into the component description field.
 
 ```typescript