Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 66623739f8cddea4acb76d449efb31eeab9bd1ef
  - Merge "update the release notes"
  - update the release notes
    
    Issue-ID: SO-2519
    
    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I2079cb72c8851b8b5b8a3616161d4b20fb3a2792
    (cherry picked from commit 3c5dbddf5fe76e7c0eee208ebe0cb36cfb774e15)
    
1 file changed