docs: upgrade doc with http-facade (#22)

Signed-off-by: moxiaoying <[email protected]>

Author: CennyMo

README.md

@@ -2,10 +2,10 @@
 
 ![License](https://img.shields.io/badge/license-Apache2.0-green) ![Language](https://img.shields.io/badge/language-Java-blue.svg) [![version](https://img.shields.io/github/v/tag/protocol-laboratory/bookkeeper-admin-java?label=release&color=blue)](https://github.com/protocol-laboratory/bookkeeper-admin-java/releases) [![codecov](https://codecov.io/gh/protocol-laboratory/bookkeeper-admin-java/branch/main/graph/badge.svg)](https://codecov.io/gh/protocol-laboratory/bookkeeper-admin-java)
 
-This is a Java library that provides an HTTP client built using the built-in HTTP client of the JDK to interact with the Bookkeeper HTTP API.
+This is a Java library that provides an HTTP client to interact with the Bookkeeper HTTP API, supporting multiple [HTTP engines](https://github.com/openfacade/http-facade?tab=readme-ov-file#httpclient-support-engines) by leveraging [http-facade](https://github.com/openfacade/http-facade).
 
 Features:
 - Basic functionality for managing Bookkeeper
 - Built on top of the built-in HTTP client of the JDK
 - Minimizes project dependencies to provide a lightweight solution
-- Requires a minimum of JDK 17
+- Requires a minimum of JDK 8