docs: fix wording (#44020)

## Documentation / Examples

- [x] Make sure the linting passes by running `pnpm build && pnpm lint`
- [x] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

docs/api-reference/next/legacy/image.md

@@ -20,7 +20,7 @@ description: Backwards compatible Image Optimization with the Legacy Image compo
 
 </details>
 
-Starting with Next.js 13, the `next/image` component was rewritten to improves both the performance and developer experience. In order to provide a backwards compatible upgrade solution, the old `next/image` was renamed to `next/legacy/image`.
+Starting with Next.js 13, the `next/image` component was rewritten to improve both the performance and developer experience. In order to provide a backwards compatible upgrade solution, the old `next/image` was renamed to `next/legacy/image`.
 
 ## Comparison