[Submodule update] sonic-py-swssdk

9ce4d19d5a199cffe2933d80e343a80ded398b4a (HEAD -> 201911, origin/201911) With the changes in PR:#5289 access to redis unix socket is given to the redis group members. Many of sonic-util commands (especially in multi-asic) case use redis unix socket to connect to DB and thus those comamnd fails without providing sudo. This PR is continuation  of PR: #7002 where we default to use TCP for Redis if user is not root

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>