docs(index): update page description

Author: bachnxuan

src/content/docs/index.mdx

@@ -1,6 +1,6 @@
 ---
 title: Welcome to ESK Project
-description: Get started building your docs site with Starlight.
+description: ESK, made simple.
 template: splash # Remove or comment out this line to display the site sidebar on this page.
 hero:
   tagline: ESK, made simple.