doc: update go report card badge

Signed-off-by: Jiyong Huang <huangjy@emqx.io>

README-CN.md

@@ -1,6 +1,7 @@
 # LF Edge eKuiper - 超轻量物联网边缘数据分析软件
 [![GitHub Release](https://img.shields.io/github/release/lf-edge/ekuiper?color=brightgreen)](https://github.com/lf-edge/ekuiper/releases)
 [![Docker Pulls](https://img.shields.io/docker/pulls/emqx/kuiper)](https://hub.docker.com/r/lfedge/ekuiper)
+[![Go Report Card](https://goreportcard.com/badge/github.com/lf-edge/ekuiper)](https://goreportcard.com/report/github.com/lf-edge/ekuiper)
 [![Slack](https://img.shields.io/badge/Slack-LF%20Edge-39AE85?logo=slack)](https://slack.lfedge.org/)
 [![Twitter](https://img.shields.io/badge/Follow-EMQ-1DA1F2?logo=twitter)](https://twitter.com/EMQTech)
 [![问答社区](https://img.shields.io/badge/问答社区-Kuiper-yellow)](https://askemq.com/c/kuiper/)

README.md

@@ -2,6 +2,7 @@
 
 [![GitHub Release](https://img.shields.io/github/release/lf-edge/ekuiper?color=brightgreen)](https://github.com/lf-edge/ekuiper/releases)
 [![Docker Pulls](https://img.shields.io/docker/pulls/emqx/kuiper)](https://hub.docker.com/r/lfedge/ekuiper)
+[![Go Report Card](https://goreportcard.com/badge/github.com/lf-edge/ekuiper)](https://goreportcard.com/report/github.com/lf-edge/ekuiper)
 [![Slack](https://img.shields.io/badge/Slack-LF%20Edge-39AE85?logo=slack)](https://slack.lfedge.org/)
 [![Twitter](https://img.shields.io/badge/Follow-EMQ-1DA1F2?logo=twitter)](https://twitter.com/EMQTech)
 [![Community](https://img.shields.io/badge/Community-Kuiper-yellow?logo=github)](https://github.com/lf-edge/ekuiper/discussions)