Fix quantile test (#167)

Author: Ariel Shtul

test/test.py

@@ -1025,7 +1025,7 @@ def testAggregations(self):
             self.assertEqual('10', res[13])
             self.assertEqual('7', res[15])
             self.assertEqual('3.60555127546', res[17])
-            self.assertEqual('10', res[19])
+            self.assertEqual('8', res[19])
             self.assertEqual(['RediSearch', 'RedisAI', 'RedisJson'], res[21])
             self.assertEqual('RediSearch', res[23])
             self.assertEqual(2, len(res[25]))