Add Tenders in Spain (#2310)

README.md

@@ -248,6 +248,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Tenders in Hungary](https://tenders.guru/hu/api) | Get data for procurements in Hungary in JSON format | No | Yes | Unknown |
 | [Tenders in Poland](https://tenders.guru/pl/api) | Get data for procurements in Poland in JSON format | No | Yes | Unknown |
 | [Tenders in Romania](https://tenders.guru/ro/api) | Get data for procurements in Romania in JSON format | No | Yes | Unknown |
+| [Tenders in Spain](https://tenders.guru/es/api) | Get data for procurements in Spain in JSON format | No | Yes | Unknown |
 | [Trello](https://developers.trello.com/) | Boards, lists and cards to help you organize and prioritize your projects | `OAuth` | Yes | Unknown |
 
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