Merge pull request #2228 from mkubliniak/patch-1

Update link to Public Rest API for Binance

Author: timmolter

xchange-binance/api-specification.txt

@@ -6,4 +6,4 @@ This api provides access to such information as tickers, trades, orderbooks and
 
 Documentation
 -------------
-https://www.binance.com/restapipub.html
+https://github.com/binance-exchange/binance-official-api-docs/blob/master/rest-api.md