Adding info for sentinel handling failover when Redis client is acquired with master_for() method. (#3578)

Co-authored-by: Elena Kolevska <[email protected]>

Author: petyaslavova

redis/asyncio/sentinel.py

@@ -326,6 +326,8 @@ def master_for(
     ):
         """
         Returns a redis client instance for the ``service_name`` master.
+        Sentinel client will detect failover and reconnect Redis clients
+        automatically.
 
         A :py:class:`~redis.sentinel.SentinelConnectionPool` class is
         used to retrieve the master's address before establishing a new

redis/sentinel.py

@@ -349,6 +349,8 @@ def master_for(
     ):
         """
         Returns a redis client instance for the ``service_name`` master.
+        Sentinel client will detect failover and reconnect Redis clients
+        automatically.
 
         A :py:class:`~redis.sentinel.SentinelConnectionPool` class is
         used to retrieve the master's address before establishing a new