Update git submodules

* Update docs/submodules/dcaegen2.git from branch 'master'
  to f94afca1487c0d0a9f073eb0434df5483929f0fa
  - Merge "Update dfc certificates instruction"
  - Update dfc certificates instruction
    
    Change-Id: Icfbaf51d79bf1471a822b4d506d055baec185070
    Issue-ID: DCAEGEN2-1662
    Signed-off-by: ecaiyanlinux <martin.c.yan@est.tech>
    
1 file changed