update readme for TS @type/node-fetch (#1405)

adamellsworth · adamellsworth · web-flow · commit 7ba5bc9e0aff · 2021-12-06T17:03:27.000+01:00
Co-authored-by: adamellsworth &lt;adam.d.ellsworth@me.com&gt;
diff --git a/README.md b/README.md
@@ -750,7 +750,7 @@ An Error thrown when the request is aborted in response to an `AbortSignal`'s `a
 For older versions please use the type definitions from [DefinitelyTyped](https://github.com/DefinitelyTyped/DefinitelyTyped):
 
 ```sh
-npm install --save-dev @types/node-fetch
+npm install --save-dev @types/node-fetch@2.x
 ```
 
 ## Acknowledgement
