typo

Co-Authored-By: Enrique Piqueras <epiqueras@users.noreply.github.com>

docs/designers-developers/developers/backward-compatibility/README.md

@@ -26,7 +26,7 @@ Production packages use the `wp` global variable to provide APIs to third-party
 
 * The name of the component should not change.
 * The props of the component should not be removed.
-* Existing prop values should continue to be supported. If a component accepts a function as prop, we can update the component to accept a new type for the same prop, but it shouldn't break existing usage.
+* Existing prop values should continue to be supported. If a component accepts a function as a prop, we can update the component to accept a new type for the same prop, but it shouldn't break existing usage.
 * Adding new props is allowed.
 * React Context dependencies can only be added or removed if we ensure the previous context contract is not breaking.