Fix typo. K8s - > Kubernetes

README.md

@@ -4,7 +4,7 @@ Apache SkyWalking | [中文](README_ZH.md)
 <img src="https://skywalkingtest.github.io/page-resources/3.0/skywalking.png" alt="Sky Walking logo" height="90px" align="right" />
 
 **SkyWalking**: APM (application performance monitor) tool for distributed systems, especially designed for 
-microservices, cloud native and container-based (Docker, K8s, Mesos) architectures.
+microservices, cloud native and container-based (Docker, Kubernetes, Mesos) architectures.
 Underlying technology is a distributed tracing system.
 
 [![GitHub stars](https://img.shields.io/github/stars/apache/incubator-skywalking.svg?style=for-the-badge&label=Stars&logo=github)](https://github.com/apache/incubator-skywalking)

README_ZH.md

@@ -3,7 +3,7 @@ Apache SkyWalking | [English](README.md)
 
 <img src="https://skywalkingtest.github.io/page-resources/3.0/skywalking.png" alt="Sky Walking logo" height="90px" align="right" />
 
-**SkyWalking**: 针对分布式系统的APM（应用性能监控）系统，特别针对微服务、cloud native和容器化(Docker, K8s, Mesos)架构，
+**SkyWalking**: 针对分布式系统的APM（应用性能监控）系统，特别针对微服务、cloud native和容器化(Docker, Kubernetes, Mesos)架构，
 其核心是个分布式追踪系统。
 
 [![GitHub stars](https://img.shields.io/github/stars/apache/incubator-skywalking.svg?style=for-the-badge&label=Stars&logo=github)](https://github.com/apache/incubator-skywalking)