[202012][sonic-platform-common] submodule update

This PR updates the following commits in 202012

1f32e5c (HEAD -> 202012, origin/202012) [ycable][credo] Fix the is_link_active API for Credo Ycable (sonic-net#260)
c249681 [Y-Cable][Credo] add theading locker to support thread-safe calling, add SKU check for download_firmware API.  (sonic-net#222)

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