docs: Update dependent-queries.md (#5391)

I believe `isLoading` has been renamed to `isPending`

Author: g3r4n

docs/react/guides/dependent-queries.md

@@ -35,22 +35,22 @@ The `projects` query will start in:
 
 ```tsx
 status: 'pending'
-isLoading: false
+isPending: false
 fetchStatus: 'idle'
 ```
 
 As soon as the `user` is available, the `projects` query will be `enabled` and will then transition to:
 
 ```tsx
 status: 'pending'
-isLoading: true
+isPending: true
 fetchStatus: 'fetching'
 ```
 
 Once we have the projects, it will go to:
 
 ```tsx
 status: 'success'
-isLoading: false
+isPending: false
 fetchStatus: 'idle'
 ```