Update ci status badge (#229)

* Use Github actions status badge

* Fix badge URI

* Linkify status badge

Author: pintsized

README.md

@@ -6,7 +6,7 @@ Lua HTTP client cosocket driver for [OpenResty](http://openresty.org/) / [ngx\_l
 
 Production ready.
 
-[![Build Status](https://travis-ci.org/ledgetech/lua-resty-http.svg?branch=master)](https://travis-ci.org/ledgetech/lua-resty-http)
+[![Test](https://github.com/ledgetech/lua-resty-http/actions/workflows/test.yml/badge.svg)]((https://github.com/ledgetech/lua-resty-http/actions)
 
 ## Features