Fixes image ref in CONTRIBUTING.md

I really should have double-checked this beforehand :U

.github/CONTRIBUTING.md

@@ -1,4 +1,4 @@
-![A depiction of the 'RAIN WORLD' title screen, featuring Nomad.](mod/decals/Notocorda_TitleScreen.png)
+![A depiction of the 'RAIN WORLD' title screen, featuring Nomad.](../mod/decals/Notocorda_TitleScreen.png)
 
 ## Introduction
 The following is a general guide on how to help out for an open-source C# project like this, for those unfamiliar with typical etiquette and expectations. **These are not rules**, just some common wisdom that will make it easier for you to get your code merged and this mod further on its way to being complete! ❤️
@@ -12,4 +12,4 @@ There's no set style, but here's some recommendations:
 
 - Use file-wide namespaces instead of namespace blocks. This means writing `namespace Deadlands;` instead of `namespace Deadlands { /* ... all the code ... */ }`.
 - Never use `unsafe`.
-- Be communicative! Code you write is, in part, a conversation you are having with the rest of us. Explain yourself, use clear variable names, and keep it simple.
+- Be communicative! Code you write is, in part, a conversation you are having with the rest of us. Explain yourself, use clear variable names, and keep it simple.