Update docs: SQLAlchemy Passing session configuration - Presto (#176)

Author: Dineshkarthik

README.rst

@@ -69,7 +69,11 @@ Passing session configuration
     hive.connect('localhost', configuration={'hive.exec.reducers.max': '123'})
     presto.connect('localhost', session_props={'query_max_run_time': '1234m'})
     # SQLAlchemy
-    create_engine('presto://user@host:443/hive', connect_args={'protocol': 'https'})
+    create_engine(
+        'presto://user@host:443/hive',
+        connect_args={'protocol': 'https',
+                      'session_props': {'query_max_run_time': '1234m'}}
+    )
     create_engine(
         'hive://user@host:10000/database',
         connect_args={'configuration': {'hive.exec.reducers.max': '123'}},