[Doc] Fix useReference hook docs

docs/Upgrade.md

@@ -3274,7 +3274,7 @@ Use the `<Title>` component instead.
 ### Removed Deprecated Elements
 
 - Removed `<BulkDeleteAction>` (use `<BulkDeleteButton>` instead)
-- Removed `<ReferenceFieldController>` (use `useReferenceFieldController` instead)
+- Removed `<ReferenceFieldController>` (use [`useReference`](./useGetOne.md#aggregating-getone-calls) instead)
 - Removed `<ReferenceArrayFieldController>` (use `useReferenceArrayFieldController` instead)
 - Removed `<ReferenceManyFieldController>` (use `useReferenceManyFieldController` instead)
 - Removed `<ReferenceInputController>` (use `useReferenceInputController` instead)

docs/useGetOne.md

@@ -90,7 +90,7 @@ const UserProfile = () => {
 
 This results in less calls to the dataProvider. For instance, if the `<UserProfile>` component above is rendered in a `<Datagrid>`, it will only make one call to `dataProvider.getMany()` for the entire list instead of one call to `dataProvider.getOne()` per row.
 
-As this hook is often used to fetch references, react-admin exposes a `useReference` hook, which avoids doing the array conversion manually. It's an application hook rather than a data provider hook, so its syntax is a bit different. Prefer `useReference` to `useGetManyAggregate` when you use `useGetOne` to fetch a reference.
+As `useGetManyAggregate` is often used to fetch references, react-admin exposes a `useReference` hook, which avoids doing the array conversion manually. It's an application hook rather than a data provider hook, so its syntax is a bit different. Prefer `useReference` to `useGetManyAggregate` when you use `useGetOne` to fetch a reference.
 
 ```diff
 -import { useGetOne, useRecordContext } from 'react-admin';