Update README.md

Author: yaegor

README.md

@@ -1,7 +1,9 @@
-teamcity icon: [![](http://teamcity.jetbrains.com/app/rest/builds/buildType:bt230/statusIcon)][1]
+teamcity icon (http): [![](http://teamcity.jetbrains.com/app/rest/builds/buildType:bt230/statusIcon)][1]
+teamcity icon (https): [![](https://teamcity.jetbrains.com/app/rest/builds/buildType:bt230/statusIcon)][2]
 
 JetBrains logo via HTTPS: ![](https://www.jetbrains.com/img/logos/logo_JB_tagline.png)
 
 JetBrains logo via HTTP: ![](http://www.jetbrains.com/img/logos/logo_JB_tagline.png)
 
   [1]: http://teamcity.jetbrains.com/viewType.html?buildTypeId=bt230
+  [2]: https://teamcity.jetbrains.com/viewType.html?buildTypeId=bt230