Update link: newton.now.sh -> newton.vercel.app

Return: HTTP Code 308

Ref: https://github.com/public-apis/public-apis/runs/3368073631?check_suite_focus=true#step:3:23

README.md

@@ -894,7 +894,7 @@ API | Description | Auth | HTTPS | CORS |
 | [NASA](https://api.nasa.gov) | NASA data, including imagery | No | Yes | Unknown |
 | [NASA APOD (official API)](https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY) | Official API for getting APOD (Astronomy Image of the Day) images along with metadata | `apiKey` | Yes | Yes |
 | [NASA APOD (unofficial API)](https://apodapi.herokuapp.com/) | API for getting APOD (Astronomy Image of the Day) images along with metadata | No | Yes | Yes |
-| [Newton](https://newton.now.sh/) | Symbolic and Arithmetic Math Calculator | No | Yes | Unknown |
+| [Newton](https://newton.vercel.app) | Symbolic and Arithmetic Math Calculator | No | Yes | Unknown |
 | [Numbers](https://math.tools/api/numbers/) | Number of the day, random number, number facts and anything else you want to do with numbers | `apiKey` | Yes | Yes |
 | [Numbers](http://numbersapi.com) | Facts about numbers | No | No | Unknown |
 | [Open Notify](http://open-notify.org/Open-Notify-API/) | ISS astronauts, current location, etc | No | No | Unknown |