Adding bh chapter information (#34)

* Adding BH venue info to the pandas sprint page

* Adding the BH sponsor logo

Author: Leonardo Rodrigues Lima de Souza Pinto

pandas/assets/images/sponsors/una-logo.jpg

@@ -257,10 +257,10 @@
             {"title": "Belo Horizonte",
              "description": "PyData Belo Horizonte",
              "url": "https://www.meetup.com/PyData-Belo-Horizonte/",
-             "sponsor_image": "",
-             "sponsor_url": "",
-             "time": "TBC",
-             "address": "TBC",
+             "sponsor_image": "una-logo.jpg",
+             "sponsor_url": "https://www.una.br/",
+             "time": "9:30 AM",
+             "address": "UNA Campus Barro Preto - Rua dos Goitacazes, 1159",
              "lat": -19.919126,
              "lng": -43.938628},
             {"title": "Brasília",