Update git submodules

* Update docs/submodules/integration.git from branch 'master'
  to 6294afdd6c55bf8236aefbb1c6e0b530aaf70c1c
  - Read the docs improvement for 5G - PNF Pre-Onboarding and Onboarding
    
    Issue-ID: INT-1240
    
    Signed-off-by: Krzysztof Kuzmicki <krzysztof.kuzmicki@nokia.com>
    Change-Id: I0c30ebfa9f55be3bea51bc5542eda4b648bf5c93
    
1 file changed