Added Changelog reference (#97)

docs/Update.md

@@ -8,4 +8,8 @@ The easiest way to update Lychee is with `git`:
 
 1. Download the [newest Version](https://github.com/electerious/Lychee/archive/master.zip)
 2. Replace all existing files, excluding `uploads/` and `data/`
-3. Open Lychee (and enter your database details)
+3. Open Lychee (and enter your database details)
+
+### Changelog
+
+Take a look at the [Changelog](Changelog.md) to see what's new.