Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 52edb45786cfd54ab22cef9e3ece62f946ca9052
  - Merge "Enhancing SO SDC Controller to invoke ONAP-ETSI Catalog APIs"
  - Enhancing SO SDC Controller to invoke ONAP-ETSI Catalog APIs
    
    Change-Id: I9f0ba05c14478b9165c2c470559567513e1919cf
    Issue-ID: SO-2406
    Signed-off-by: waqas.ikram <waqas.ikram@est.tech>
    
1 file changed