[Submodule] Update src/sonic-py-swsssdk (#11385)

Updating sonic-utilities sub module with the following commits

cc847a2 Change diff coverage threshold to 80%
ca785a2 Remove sonic-db-cli

#### Why I did it
To fix sonic-db-cli high CPU usage on SONiC startup issue: #10218
sonic-db-cli re-write with c++ and move to sonic-swss-common repo.

#### How I did it

#### How to verify it

#### Which release branch to backport (provide reason below if selected)

#### Description for the changelog
cc847a2 Change diff coverage threshold to 80%
ca785a2 Remove sonic-db-cli

#### A picture of a cute animal (not mandatory but encouraged)


Co-authored-by: liuh-80 <azureuser@liuh-dev-vm-02.5fg3zjdzj2xezlx1yazx5oxkzd.hx.internal.cloudapp.net>