docs: fix build errors + update medusa docs link (#8550)

* docs: update medusa docs link

* fix @medusajs/icon version

* fix user guide build

* fix build error

www/apps/user-guide/app/page.mdx

@@ -1,4 +1,4 @@
-import { BellAlert, Sidebar } from "@medusajs/icons"
+import { BellAlert, SidebarLeft } from "@medusajs/icons"
 
 export const metadata = {
   title: `Medusa Admin User Guide`,
@@ -40,7 +40,7 @@ The sidebar menu includes the main navigation of your Medusa Admin. You can use
 
 ![Sidebar Menu](https://res.cloudinary.com/dza7lstvk/image/upload/v1697793775/Medusa%20Docs/User%20Guide/Screenshot_2023-10-20_at_12.22.43_PM_shbr0e.png)
 
-You can hide the sidebar by clicking the <InlineIcon Icon={Sidebar} alt="sidebar" /> icon at the top next to the sidebar. Clicking it again shows the sidebar.
+You can hide the sidebar by clicking the <InlineIcon Icon={SidebarLeft} alt="sidebar" /> icon at the top next to the sidebar. Clicking it again shows the sidebar.
 
 ### Search Bar
 

www/apps/user-guide/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@mdx-js/loader": "^3.0.0",
     "@mdx-js/react": "^3.0.0",
-    "@medusajs/icons": "^1.2.0",
+    "@medusajs/icons": "preview",
     "@next/mdx": "^14.2.3",
     "clsx": "^2.1.0",
     "docs-ui": "*",