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>
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index c1dc4f3..52edb45 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit c1dc4f359b6738fc7d8c9ae7f926dea0130e9a43
+Subproject commit 52edb45786cfd54ab22cef9e3ece62f946ca9052