[submodule]: update sonic-platform-daemons (sonic-net#7196)

c5be3ca [psud] Increase unit test coverage; Refactor mock platform (sonic-net#154)
450b7d7 Bug fix: the fields that are not supported by vendor should be "N/A" in STATE_DB (sonic-net#168)

Signed-off-by: Stephen Sun <[email protected]>

Author: stephenxs