Fixed typo in page context.md (#1121)

Co-authored-by: Sarah <gerrardsarah@gmail.com>

Author: alexmuzenhardt

src/routes/concepts/context.mdx

@@ -99,7 +99,7 @@ export const App = () => (
 ## Customizing Context Utilities
 
 When an application contains multiple context objects, it can be difficult to keep track of which context object is being used.
-To solve this issue, you can create a custom utilities to create a more readable way to access the context values.
+To solve this issue, you can create a custom utility to create a more readable way to access the context values.
 
 For example, when wrapping a component tree, you may want to create a custom `Provider` component that can be used to wrap the component tree.
 This also provides you with the option of re-using the `Provider` component in other parts of your application, if needed.