Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 40396c8763a600059d025fb202802ac70d406b08
  - Merge "Add subscription for notifications"
  - Add subscription for notifications
    
    Issue-ID: SO-1628
    Change-Id: I302e5c65f9b01a8608053b6f83696d0161cd2bf2
    Signed-off-by: MichaelMorris <michael.morris@est.tech>
    
1 file changed