fix casing

content/notes/troubleshooting.md

@@ -25,7 +25,7 @@ source ~/.bash_profile
 ```
 
 ### How come my notes aren't being rendered?
-You probably forgot to include front matter in your Markdown files. You can either setup [Obsidian](notes/Obsidian) to do this for you or you need to manually define it. More details in [the 'how to edit' guide](notes/editing.md).
+You probably forgot to include front matter in your Markdown files. You can either setup [Obsidian](notes/Obsidian.md) to do this for you or you need to manually define it. More details in [the 'how to edit' guide](notes/editing.md).
 
 ### My custom domain isn't working!
 Walk through the steps in [the hosting guide](notes/hosting.md) again. Make sure you wait 30 min to 1 hour for changes to take effect.