Accessibility#9196 (#1319)
## What/Why - Screen reader does not announce the search result information as `No results` on providing invalid input ## Changes - [`src/components/search.js`](https://github.com/npm/documentation/pull/1319/files#diff-995f95946b0cbf613b5cf5d8d6335cb1612dcb31907922cd5da28be90a6ff442) > Add `aria-live` as `polite` to Box element > Add `announce` function to trigger screen reader announcing the `No results` message when there is no search result ## Before  ## After - The screen reader announces the search result information as `No results` on providing invalid input ## References - https://github.com/github/accessibility-audits/issues/9196