docs: Add missing apostrophe (#57626)

Author: ajz003

docs/02-app/01-building-your-application/01-routing/07-error-handling.mdx

@@ -153,7 +153,7 @@ For example, a nested route with two segments that both include `layout.js` and
 The nested component hierarchy has implications for the behavior of `error.js` files across a nested route:
 
 - Errors bubble up to the nearest parent error boundary. This means an `error.js` file will handle errors for all its nested child segments. More or less granular error UI can be achieved by placing `error.js` files at different levels in the nested folders of a route.
-- An `error.js` boundary will **not** handle errors thrown in a `layout.js` component in the **same** segment because the error boundary is nested **inside** that layouts component.
+- An `error.js` boundary will **not** handle errors thrown in a `layout.js` component in the **same** segment because the error boundary is nested **inside** that layout's component.
 
 ### Handling Errors in Layouts