typo: "Sao Paulo" --> "São Paulo"

README.md

@@ -179,7 +179,7 @@ A collective list of JSON APIs for use in web development.
 | Transport for Vancouver, Canada | TransLink | Yes | [Go!](https://developer.translink.ca/) |
 | Transport for Washington, US | Washington Metro transport API | Yes | [Go!](https://developer.wmata.com/) |
 | Transport for Paris, France | RATP Open Data API | No | [Go!](http://data.ratp.fr/api/v1/console/datasets/1.0/search/) |
-| Transport for Sao Paulo, Brazil | SPTrans | Yes | [Go!](http://www.sptrans.com.br/desenvolvedores/APIOlhoVivo/Documentacao.aspx) |
+| Transport for São Paulo, Brazil | SPTrans | Yes | [Go!](http://www.sptrans.com.br/desenvolvedores/APIOlhoVivo/Documentacao.aspx) |
 | Transport for The Netherlands | NS | No | [Go!](http://www.ns.nl/reisinformatie/ns-api) |
 | Schiphol Airport API | Schiphol | Yes | [Go!](https://flight-info.3scale.net/)