Remove 'VITE_' from environment variables to match code in supabase.ts

Author: bonnie

examples/react/start-supabase-basic/README.md

@@ -18,8 +18,8 @@ npx gitpick TanStack/router/tree/main/examples/react/start-supabase-basic start-
 This example requires Supabase configuration. The `.env` file contains the necessary environment variables:
 
 ```env
-VITE_SUPABASE_URL=your-project-url
-VITE_SUPABASE_ANON_KEY=your-anon-key
+SUPABASE_URL=your-project-url
+SUPABASE_ANON_KEY=your-anon-key
 ```
 
 You'll need to: