Changed README to refer to https images only (#675)

Author: couling

README.md

@@ -2,13 +2,13 @@
 
 # Gitea - Git with a cup of tea
 
-[![Build Status](http://drone.gitea.io/api/badges/go-gitea/gitea/status.svg)](http://drone.gitea.io/go-gitea/gitea)
+[![Build Status](https://drone.gitea.io/api/badges/go-gitea/gitea/status.svg)](https://drone.gitea.io/go-gitea/gitea)
 [![Join the chat at https://gitter.im/go-gitea/gitea](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-gitea/gitea?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![](https://images.microbadger.com/badges/image/gitea/gitea.svg)](http://microbadger.com/images/gitea/gitea "Get your own image badge on microbadger.com")
+[![](https://images.microbadger.com/badges/image/gitea/gitea.svg)](https://microbadger.com/images/gitea/gitea "Get your own image badge on microbadger.com")
 [![Coverage Status](https://coverage.gitea.io/badges/go-gitea/gitea/coverage.svg)](https://coverage.gitea.io/go-gitea/gitea)
 [![Go Report Card](https://goreportcard.com/badge/code.gitea.io/gitea)](https://goreportcard.com/report/code.gitea.io/gitea)
 [![GoDoc](https://godoc.org/code.gitea.io/gitea?status.svg)](https://godoc.org/code.gitea.io/gitea)
-[![Release](http://github-release-version.herokuapp.com/github/go-gitea/gitea/release.svg?style=flat)](https://github.com/go-gitea/gitea/releases/latest)
+[![Release](https://github-release-version.herokuapp.com/github/go-gitea/gitea/release.svg?style=flat)](https://github.com/go-gitea/gitea/releases/latest)
 
 ||||
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README_ZH.md

@@ -2,13 +2,13 @@
 
 # Gitea - Git with a cup of tea
 
-[![Build Status](http://drone.gitea.io/api/badges/go-gitea/gitea/status.svg)](http://drone.gitea.io/go-gitea/gitea)
+[![Build Status](https://drone.gitea.io/api/badges/go-gitea/gitea/status.svg)](https://drone.gitea.io/go-gitea/gitea)
 [![Join the chat at https://gitter.im/go-gitea/gitea](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-gitea/gitea?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![](https://images.microbadger.com/badges/image/gitea/gitea.svg)](http://microbadger.com/images/gitea/gitea "Get your own image badge on microbadger.com")
+[![](https://images.microbadger.com/badges/image/gitea/gitea.svg)](https://microbadger.com/images/gitea/gitea "Get your own image badge on microbadger.com")
 [![Coverage Status](https://coverage.gitea.io/badges/go-gitea/gitea/coverage.svg)](https://coverage.gitea.io/go-gitea/gitea)
 [![Go Report Card](https://goreportcard.com/badge/code.gitea.io/gitea)](https://goreportcard.com/report/code.gitea.io/gitea)
 [![GoDoc](https://godoc.org/code.gitea.io/gitea?status.svg)](https://godoc.org/code.gitea.io/gitea)
-[![Release](http://github-release-version.herokuapp.com/github/go-gitea/gitea/release.svg?style=flat)](https://github.com/go-gitea/gitea/releases/latest)
+[![Release](https://github-release-version.herokuapp.com/github/go-gitea/gitea/release.svg?style=flat)](https://github.com/go-gitea/gitea/releases/latest)
 
 ||||
 |:-------------:|:-------:|:-------:|