Fixed formatting in Changelog

Author: johann8384

CHANGELOG.md

@@ -2,10 +2,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
-##[1.3.4](https://github.com/OpenTSDB/tcollector/issues?q=is%3Aopen+is%3Aissue+milestone%3A1.3.4)
+## [1.3.4](https://github.com/OpenTSDB/tcollector/issues?q=is%3Aopen+is%3Aissue+milestone%3A1.3.4)
 
 
-##[1.3.3](https://github.com/OpenTSDB/tcollector/issues?utf8=%E2%9C%93&q=milestone%3A1.3.3)
+## [1.3.3](https://github.com/OpenTSDB/tcollector/issues?utf8=%E2%9C%93&q=milestone%3A1.3.3)
 
 ### Support
 - Dropped Support for Python 2.x, <=3.4.x