docs: Link to MDN docs about spread

Author: ntucker

docs/core/api/useQuery.md

@@ -51,7 +51,7 @@ function useQuery<S extends Queryable>(
 
 ### Queryable
 
-`Queryable` schemas require an `queryKey()` method that returns something. These include
+[Queryable](/rest/api/schema#queryable) schemas require an `queryKey()` method that returns something. These include
 [Entity](/rest/api/Entity), [All](/rest/api/All), [Collection](/rest/api/Collection), [Query](/rest/api/Query),
 and [Union](/rest/api/Union).
 

docs/rest/api/RestEndpoint.md

@@ -131,7 +131,7 @@ const todo = await getTodo({ id: 1 });
 
 ### Configuration sharing
 
-Use [RestEndpoint.extend()](#extend) instead of `{...getTodo}` (spread)
+Use [RestEndpoint.extend()](#extend) instead of `{...getTodo}` ([Object spread](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax#spread_in_object_literals))
 
 ```ts
 const updateTodo = getTodo.extend({ method: 'PUT' });