update what's new for 0.8 release (#2119)

Signed-off-by: RongGu <gurongwalker@gmail.com>
Signed-off-by: RongGu <gurongwalker@gmail.com>

README-zh_CN.md

@@ -14,6 +14,7 @@
 
 |![更新](http://kubeflow.oss-cn-beijing.aliyuncs.com/Static/bell-outline-badge.svg) 最新进展：|
 |------------------|
+|Sep. 03th, 2022. Fluid v0.8.0  **发布**! 提供一系列新功能，包括基于Fluid边车支持的Serverlesss作业生命周期管理，按需启动Runtime controller，自动化CRD更新, 严格的pod与数据集节点的调度机制， JuicefsRuntime的Arm64支持, Alluxio Runtime的GCS支持等等，详情参见 [CHANGELOG](CHANGELOG.md)。|
 |Mar. 16th, 2021. Fluid v0.5.0 **发布**! 提供一系列新功能，包括提供数据集缓存的在线弹性扩缩容，元数据备份与恢复，Fuse全局模式部署等，详情参见 [CHANGELOG](CHANGELOG.md)。|
 |Nov. 6th, 2020. Fluid v0.4.0 **发布**! 提供一系列新功能和修复上一版本的遗留问题，包括提供主动的数据预热，详情参见 [CHANGELOG](CHANGELOG.md)。|
 |Oct. 1st, 2020. Fluid v0.3.0 **发布**! 提供一系列新功能和修复上一版本的遗留问题，包括对于K8s通用的数据卷加速和主机目录加速，详情参见 [CHANGELOG](CHANGELOG.md)。|

README.md

@@ -24,6 +24,7 @@ English | [简体中文](./README-zh_CN.md)
 
 |![notification](http://kubeflow.oss-cn-beijing.aliyuncs.com/Static/bell-outline-badge.svg) What is NEW!|
 |------------------|
+|Sep. 03th, 2022. Fluid v0.8.0 is **RELEASED**! It provides various new features, such as Lifecycle management of Serverless Job with fluid sidecar support, Enable runtime controller on demand, Automatic CRD upgrader, Restrict pod scheduling to dataset cache nodes, Arm64 support with JuicefsRuntime, GCS support for Alluxio Runtime, and so on. Please check the [CHANGELOG](CHANGELOG.md) for details.|
 |Mar. 02th, 2022. Fluid v0.7.0 is **RELEASED**! It provides various new features, such as Fuse sidecar auto injection for all the runtimes (suitable for serverless environment), Fuse auto recovery and upgrade, lazy fuse mount mode, support JuiceFS cache runtime and so on. Please check the [CHANGELOG](CHANGELOG.md) for details.|
 |Aug. 11th, 2021. Fluid v0.6.0 is **RELEASED**! It provides various new features, such as dataset cache autoscaling and cronscaling, dataset cache aware Pod scheduling, HA support for cache Runtime. Please check the [CHANGELOG](CHANGELOG.md) for details.|
 |Apr. 27th, 2021. Fluid accpeted by **CNCF**! Fluid project was [accepted as an official CNCF Sandbox Project](https://lists.cncf.io/g/cncf-toc/message/5822) by CNCF Technical Oversight Committee (TOC) with a majority vote after the review process. New beginning for Fluid! .|