Fix directory name in setup instructions

Author: ComputelessComputer

apps/web/content/docs/developers/0.setup.mdx

@@ -73,7 +73,7 @@ After running the setup script, clone the repository and install dependencies:
 
 ```bash
 git clone https://github.com/fastrepl/char.git
-cd hyprnote
+cd char
 pnpm install
 ```