[docs] Fix migration feedback (mui#35232)

Co-authored-by: Olivier Tassinari <[email protected]>

docs/data/material/migration/migration-v4/migration-v4.md

@@ -71,19 +71,36 @@ If you need to support IE 11, check out our [legacy bundle](/material-ui/guides/
 
 ## Update React & TypeScript version
 
+### Update React
+
 The minimum supported version of React has been increased from v16.8.0 to v17.0.0.
 
+If you are using a React version below 17.0.0, update your packages to at least v14.11.2 for Material UI and v17.0.0 for React.
+
+With npm:
+
+```sh
+npm update @material-ui/core@^4.11.2 react@^17.0.0
+```
+
+With yarn:
+
+```sh
+yarn upgrade @material-ui/core@^4.11.2 react@^17.0.0
+```
+
+### Update TypeScript
+
 The minimum supported version of TypeScript has been increased from v3.2 to v3.5.
 
-:::warning
+:::info
 We try to align with types released by [DefinitelyTyped](https://github.com/DefinitelyTyped/DefinitelyTyped) (i.e. packages published on npm under the `@types` namespace).
 
-We will not change the minimum supported version in a major version of Material UI.
-
+We will not change the minimum supported version in a minor version of Material UI.
 However, we generally recommend not to use a TypeScript version older than the lowest supported version of DefinitelyTyped.
 :::
 
-If your project includes these packages, you'll need to update them to the `latest` version:
+If your project includes these packages, you'll need to update them:
 
 - `react-scripts`
 - `@types/react`