Fix malformed NLP url

[akotadi]

Is your pull request related to a problem? Please describe

While the sample tutorial, a error was shown for the NLP saying Unable to activate built-in NLP: Bad Request while doing the app setup configuration on link http://<APP_HOST_URL>/profile?mode=all&verify_token=<VERIFY_TOKEN>

Describe the solution

The error is a malformed URL on: https://github.com/fbsamples/original-coast-clothing/blob/main/services/graph-api.js#L214 Just change the line for: let url = new URL(`${config.apiUrl}`/me/nlp_configs);

Test plan

https://user-images.githubusercontent.com/26100917/167716327-4b4d9310-4234-4b51-b5e2-72277d90ee02.mov

Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [x] The title of my pull request is a short description of the requested changes.
• [x] I have added the label enhancement to my pull request.

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