Fix simple typo: managementment -> management

Closes #1965

Author: timgates42

kafka/coordinator/base.py

@@ -98,7 +98,7 @@ def __init__(self, client, metrics, **configs):
                 partition assignment (if enabled), and to use for fetching and
                 committing offsets. Default: 'kafka-python-default-group'
             session_timeout_ms (int): The timeout used to detect failures when
-                using Kafka's group managementment facilities. Default: 30000
+                using Kafka's group management facilities. Default: 30000
             heartbeat_interval_ms (int): The expected time in milliseconds
                 between heartbeats to the consumer coordinator when using
                 Kafka's group management feature. Heartbeats are used to ensure