Updated Changelog (markdown)

Changelog.md

@@ -1,5 +1,3 @@
-# Changelog
-
 This change log tracks the releases on our [pilot server](https://recodex.mff.cuni.cz/). Since ReCodEx is in fact composed of many components, we also provide a table of component version which work together in stable releases.
 
 | Date | [web-app](https://github.com/ReCodEx/web-app/releases) | [core-api](https://github.com/ReCodEx/api/releases) | [worker](https://github.com/ReCodEx/worker/releases) | [broker](https://github.com/ReCodEx/broker/releases) | [fileserver](https://github.com/ReCodEx/fileserver/releases) | [monitor](https://github.com/ReCodEx/monitor/releases) | [cleaner](https://github.com/ReCodEx/cleaner/releases) |