[skip ci] Update README (#1861)

Signed-off-by: Njinhai <hai.jin@zilliz.com>

README.md

@@ -23,6 +23,8 @@ Milvus has the following architecture:
 
 For more detailed introduction of Milvus and its architecture, see [Milvus overview](https://www.milvus.io/docs/about_milvus/overview.md). Keep up-to-date with newest releases and latest updates by reading Milvus [release notes](https://www.milvus.io/docs/releases/release_notes.md).
 
+Milvus is an [LF AI Foundation](https://lfai.foundation/) incubation project. Learn more at [lfai.foundation](https://lfai.foundation/).
+
 ## Get started
 
 ### Install Milvus

README_CN.md

@@ -25,6 +25,8 @@ Milvus 的架构如下：
 
 若要了解 Milvus 详细介绍和整体架构，请访问 [Milvus 简介](https://www.milvus.io/cn/docs/about_milvus/overview.md)。您可以通过 [版本发布说明](https://www.milvus.io/cn/docs/releases/release_notes.md) 获取最新版本的功能和更新。
 
+Milvus是一个[LF AI基金会](https://lfai.foundation/)的孵化项目。获取更多，请访问[lfai.foundation](https://lfai.foundation/)。
+
 ## Milvus 快速上手
 
 ### 安装 Milvus