docs: add note about fetcher.load revalidation (#9582)

docs/hooks/use-fetcher.md

@@ -117,6 +117,8 @@ fetcher.load("/some/route");
 fetcher.load("/some/route?foo=bar");
 ```
 
+`fetcher.load`'s revalidate by default after action submissions and explicit revalidation requests via [`useRevalidator`][userevalidator]. Because `fetcher.load` loads a specific URL they don't revalidate on changes to route param or URL search param. You can use [`shouldRevalidate`][shouldrevalidate] to optimize which data should be reloaded.
+
 #### `options.unstable_flushSync`
 
 The `unstable_flushSync` option tells React Router DOM to wrap the initial state update for this `fetcher.load` in a [`ReactDOM.flushSync`][flush-sync] call instead of the default [`React.startTransition`][start-transition]. This allows you to perform synchronous DOM actions immediately after the update is flushed to the DOM.
@@ -176,3 +178,5 @@ The form method of the submission.
 [flush-sync]: https://react.dev/reference/react-dom/flushSync
 [start-transition]: https://react.dev/reference/react/startTransition
 [use-submit]: ./use-submit
+[userevalidator]: ./use-revalidator
+[shouldrevalidate]: ../route/should-revalidate#shouldrevalidate