Use relative URL for changelog link

docs/index.md

@@ -1,6 +1,6 @@
 # Heynote Documentation
 
-[Changelog](https://heynote.com/docs/changelog/)
+[Changelog](/docs/changelog/)
 
 Heynote is a dedicated scratchpad for developers. It functions as a large persistent text buffer where you can write down anything you like. Works great for that Slack message you don't want to accidentally send, a JSON response from an API you're working with, notes from a meeting, your daily to-do list, etc.