Update README.md

README.md

@@ -205,9 +205,8 @@ Please note a passing build status indicates all listed APIs are available since
 | API | Description | Auth | HTTPS | Link |
 |---|---|---|---|---|
 | AirVisual | Air quality and weather data | `apiKey` | Yes | [Go!](https://airvisual.com/api) |
-| PM2.5.in | Air quality of China | `apiKey` | No | [Go!](http://www.pm25.in/api_doc) |
 | OpenAQ | Open air quality data | `apiKey` | Yes | [Go!](https://docs.openaq.org/) |
-
+| PM2.5.in | Air quality of China | `apiKey` | No | [Go!](http://www.pm25.in/api_doc) |
 
 ### Finance