Add Notion api

Update README.md

Update README.md
Co-authored-by: Matheus Felipe <50463866+matheusfelipeog@users.noreply.github.com>

README.md

@@ -366,6 +366,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Code::Stats](https://codestats.net/api-docs) | Automatic time tracking for programmers | `apiKey` | Yes | No |
 | [File.io](https://www.file.io) | File Sharing | No | Yes | Unknown |
 | [Mercury](https://mercury.postlight.com/web-parser/) | Web parser | `apiKey` | Yes | Unknown |
+| [Notion](https://developers.notion.com/docs/getting-started) | Integrate with Notion | `OAuth` | Yes | Unknown |
 | [pdflayer](https://pdflayer.com) | HTML/URL to PDF | `apiKey` | Yes | Unknown |
 | [Pocket](https://getpocket.com/developer/) | Bookmarking service | `OAuth` | Yes | Unknown |
 | [PrexView](https://prexview.com) | Data from XML or JSON to PDF, HTML or Image | `apiKey` | Yes | Unknown |