Update shallow routing caveat (#35052)

Minor change to improve caveat clarity of doing shallow routing

## Documentation / Examples

- [x] Make sure the linting passes by running `yarn lint`


Co-authored-by: Lee Robinson <9113740+leerob@users.noreply.github.com>

docs/routing/shallow-routing.md

@@ -54,7 +54,7 @@ componentDidUpdate(prevProps) {
 
 ## Caveats
 
-Shallow routing **only** works for same page URL changes. For example, let's assume we have another page called `pages/about.js`, and you run this:
+Shallow routing **only** works for URL changes in the current page. For example, let's assume we have another page called `pages/about.js`, and you run this:
 
 ```jsx
 router.push('/?counter=10', '/about?counter=10', { shallow: true })