Add Quran API to books.

README.md

@@ -132,6 +132,7 @@ API | Description | Auth | HTTPS | CORS |
 | [New York Times Books](https://developer.nytimes.com/docs/books-product/1/overview) | Book reviews and The New York Times Best Sellers lists | `apiKey` | Yes | Unknown |
 | [Open Library](https://openlibrary.org/developers/api) | Books, book covers and related data | No | Yes | No |
 | [Penguin Publishing](http://www.penguinrandomhouse.biz/webservices/rest/) | Books, book covers and related data | No | Yes | Yes |
+| [Quran](https://quran.api-docs.io/) | RESTful Quran API with multiple languages | No | Yes | Yes |
 | [Rig Veda](https://aninditabasu.github.io/indica/html/rv.html) | Gods and poets, their categories, and the verse meters, with the mandal and sukta number | No | Yes | Unknown |
 | [Shrimad Bhagavad Gita](https://vedicscriptures.github.io/) | Open Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi | No | Yes | Yes |
 | [Thirukkural](https://api-thirukkural.web.app/) | 1330 Thirukkural poems and explanation in Tamil and English | No | Yes | Yes |