[docs] Add ok_http entry to readme (#1285)

Author: Anikate-De

README.md

@@ -14,6 +14,7 @@ and the browser.
 | [http_client_conformance_tests](pkgs/http_client_conformance_tests/) | A library that tests whether implementations of package:http's `Client` class behave as expected. | |
 | [cronet_http](pkgs/cronet_http/) | An Android Flutter plugin that provides access to the [Cronet](https://developer.android.com/guide/topics/connectivity/cronet/reference/org/chromium/net/package-summary) HTTP client. | [![pub package](https://img.shields.io/pub/v/cronet_http.svg)](https://pub.dev/packages/cronet_http) |
 | [cupertino_http](pkgs/cupertino_http/) | A macOS/iOS Flutter plugin that provides access to the [Foundation URL Loading System](https://developer.apple.com/documentation/foundation/url_loading_system). | [![pub package](https://img.shields.io/pub/v/cupertino_http.svg)](https://pub.dev/packages/cupertino_http) |
+| [ok_http](pkgs/ok_http/) | An Android Flutter plugin that provides access to the [OkHttp](https://square.github.io/okhttp/) HTTP client and the OkHttp [WebSocket](https://square.github.io/okhttp/5.x/okhttp/okhttp3/-web-socket/index.html) API. | [![pub package](https://img.shields.io/pub/v/ok_http.svg)](https://pub.dev/packages/ok_http) |
 | [http_profile](pkgs/http_profile/) | A library used by HTTP client authors to integrate with the DevTools Network View. | [![pub package](https://img.shields.io/pub/v/http_profile.svg)](https://pub.dev/packages/http_profile) |
 | [web_socket_conformance_tests](pkgs/web_socket_conformance_tests/) | A library that tests whether implementations of `package:web_socket`'s `WebSocket` class behave as expected. |  |
 | [web_socket](pkgs/web_socket/) | Any easy-to-use library for communicating with WebSockets that has multiple implementations. | [![pub package](https://img.shields.io/pub/v/web_socket.svg)](https://pub.dev/packages/web_socket) |