fix: add import code for refresh tokens

Author: p-stam001

src/content/docs/developer-tools/sdks/backend/remix-sdk.mdx

@@ -410,6 +410,9 @@ export default function Protected() {
 Pass the `headers` returned from `getKindeSession` in your loader/action responses so refresh tokens rotate automatically. You can also call `refreshTokens()` manually when you need the latest data (for example after a mutation).
 
 ```typescript
+import { json, LoaderFunctionArgs } from "@remix-run/node";
+import { getKindeSession } from "@kinde-oss/kinde-remix-sdk";
+
 // Refresh tokens in the background
 export const loader = async ({request}: LoaderFunctionArgs) => {
   const {headers} = await getKindeSession(request);