Update MercadoBitcoin, new link

README.md

@@ -439,7 +439,7 @@ API | Description | Auth | HTTPS | CORS |
 | [KuCoin](https://docs.kucoin.com/) | Cryptocurrency Trading Platform | `apiKey` | Yes | Unknown |
 | [Localbitcoins](https://localbitcoins.com/api-docs/) | P2P platform to buy and sell Bitcoins | No | Yes | Unknown |
 | [Mempool](https://mempool.space/api) | Bitcoin API Service focusing on the transaction fee | No | Yes | No |
-| [MercadoBitcoin](https://www.mercadobitcoin.net/api-doc/) | Brazilian Cryptocurrency Information | No | Yes | Unknown |
+| [MercadoBitcoin](https://www.mercadobitcoin.com.br/api-doc/) | Brazilian Cryptocurrency Information | No | Yes | Unknown |
 | [Messari](https://messari.io/api) | Provides API endpoints for thousands of crypto assets | No | Yes | Unknown |
 | [Nexchange](https://nexchange2.docs.apiary.io/) | Automated cryptocurrency exchange service | No | No | Yes |
 | [Nomics](https://nomics.com/docs/) | Historical and realtime cryptocurrency prices and market data | `apiKey` | Yes | Yes |