[sonic-platform-common] sub_module update (sonic-net#6797)

This PR updates the following commits
c6b642b [ci]: download from sonic-buildimage.vs artifact (#168)
e76ecc6 [sonic_y_cable] add support for retrieving firmware info for Y cable, internal and nic temperature and voltage (#162)
f9cf8c9 [GitHub] Add pull request template (#167)
c31636e [ci] Call pip2/3 using sudo (#166)
5521f67 [ci] Test and build packages using Azure Pipelines (#164)
faca35c [ci]: Set up CI with Azure Pipelines

Signed-off-by: vaibhav-dahiya <vdahiya@microsoft.com>