Fix directory name in installation instructions

Co-authored-by: huangyiirene <7665279+huangyiirene@users.noreply.github.com>

Author: Copilot

docs/guide/installation.md

@@ -222,7 +222,7 @@ For contributing or local development:
 ```bash
 # Clone the repository
 git clone https://github.com/objectql/objectui.git
-cd object-ui
+cd objectui
 
 # Install dependencies
 pnpm install