Update git submodules

* Update docs/submodules/externalapi/nbi.git from branch 'master'
  to b4c93a77d04fe9904f2bd80d31b1b3e6f7d9c16d
  - Exclude license check for doc files
    
    Related to https://gerrit.onap.org/r/#/c/externalapi/nbi/+/101341/
    
    Issue-ID: CIMAN-33
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: I94ce6e9b251ca3e91cde38307e2dd8e402c919e1
    
1 file changed