MaxConnectionsError not used consistently

[PeterJCLaw]

Version: redis-py 5.0.4
Platform: Ubuntu 22.04

The docs around the max_connections argument in various places suggest that MaxConnectionsError should be used to indicate a lack of available connections, yet that exception type seems only to be used in one place:

redis-py/redis/asyncio/cluster.py

Line 1051 in 6751de2

raise MaxConnectionsError()

Other places use ConnectionError("Too many connections").

Is this expected? Should these all use MaxConnectionsError?