docs: changes to deployment + remove admin deployment guides (#10345)

* docs: change headings and text in deployment

* remove admin deployment guide

* generate changes

www/apps/resources/generated/files-map.mjs

@@ -567,10 +567,6 @@ export const filesMap = [
     "filePath": "/www/apps/resources/app/create-medusa-app/page.mdx",
     "pathname": "/create-medusa-app"
   },
-  {
-    "filePath": "/www/apps/resources/app/deployment/admin/vercel/page.mdx",
-    "pathname": "/deployment/admin/vercel"
-  },
   {
     "filePath": "/www/apps/resources/app/deployment/medusa-application/railway/page.mdx",
     "pathname": "/deployment/medusa-application/railway"