docs: fix astro base url

Author: favna

documentation/src/content/docs/index.mdx

@@ -8,7 +8,7 @@ hero:
         file: ../../assets/nintendoeshop.png
     actions:
         - text: Documentation
-          link: /api/readme
+          link: /nintendo-switch-eshop/api/readme/
           icon: right-arrow
           variant: primary
 ---