add workflow status badge

.github/workflows/development.yml

@@ -1,4 +1,4 @@
-name: Development Workflow
+name: CI
 
 on:
   push:

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: Release Workflow
+name: Release a tag
 
 on:
   push:

README.md

@@ -1,6 +1,10 @@
 # SFTPGo
 
-[![Build Status](https://travis-ci.org/drakkan/sftpgo.svg?branch=master)](https://travis-ci.org/drakkan/sftpgo) [![Code Coverage](https://codecov.io/gh/drakkan/sftpgo/branch/master/graph/badge.svg)](https://codecov.io/gh/drakkan/sftpgo/branch/master) [![Go Report Card](https://goreportcard.com/badge/github.com/drakkan/sftpgo)](https://goreportcard.com/report/github.com/drakkan/sftpgo) [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0) [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)
+![CI Status](https://github.com/drakkan/sftpgo/workflows/CI/badge.svg?branch=master&event=push)
+[![Code Coverage](https://codecov.io/gh/drakkan/sftpgo/branch/master/graph/badge.svg)](https://codecov.io/gh/drakkan/sftpgo/branch/master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/drakkan/sftpgo)](https://goreportcard.com/report/github.com/drakkan/sftpgo)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)
 
 Fully featured and highly configurable SFTP server, written in Go