Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to d9691b0c73b0d9cace84ca1ed7b0a30ccecc3fbd
  - Merge "Add API to support 5G usecase in swagger"
  - Add API to support 5G usecase in swagger
    
    Issue-ID: SO-2368
    
    Change-Id: I659abc5e94eeb9ef08b89f0847c0cc577d8b0dca
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    
1 file changed