[sonic-py-swsssdk]: Advance submodule (#10308)

Update sonic-py-swsssdk submodule to include below commits:

96c0590 [port_util] Fix issue: port_util.get_vlan_interface_oid_map should not raise exception when DB has not RIF data (#117)
96da8b9 [build] pin pytest-azurepipelines version (#119)

Signed-off-by: Suvarna Meenakshi <sumeenak@microsoft.com>