Fix spelling

Sam McHardy · Sam McHardy · commit 76acf84c7e12 · 2018-03-14T20:38:47.000+11:00
diff --git a/binance/client.py b/binance/client.py
@@ -697,7 +697,7 @@ def get_historical_klines(self, symbol, interval, start_str, end_str=None):
 
         :param symbol: Name of symbol pair e.g BNBBTC
         :type symbol: str
-        :param interval: Biannce Kline interval
+        :param interval: Binance Kline interval
         :type interval: str
         :param start_str: Start date string in UTC format
         :type start_str: str
