Update react to 17.0.1 in example/with-typescript-eslint-jest (#21870)

I met following warning message after invoking create-next-app for ` example/with-typescript-eslint-jest `:

```
 % yarn dev
yarn run v1.22.10
$ next dev
ready - started server on 0.0.0.0:3000, url: http://localhost:3000
warn  - React 17.0.1 or newer will be required to leverage all of the upcoming features in Next.js 11. Read more: https://err.sh/next.js/react-version
event - compiled successfully
```

I have followed the instructions in the link, and this patch is. Please merge this.

Thank you for reading.

examples/with-typescript-eslint-jest/package.json

@@ -27,8 +27,8 @@
   },
   "dependencies": {
     "next": "latest",
-    "react": "^16.13.1",
-    "react-dom": "^16.13.1"
+    "react": "^17.0.1",
+    "react-dom": "^17.0.1"
   },
   "devDependencies": {
     "@testing-library/react": "^10.0.1",