Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 5376a65d586b37f13342f9e108f224b73d4149fc
  - Merge "SO API extenstion to retrieve all PNF workflow"
  - SO API extenstion to retrieve all PNF workflow

    This commit implements SO request handler API
    onap/so/infra/workflowSpecifications/v[x]/pnfWorkFlows.
    It is used to get all the pnf workflows exist in
    catalogdb.

    Issue-ID: SO-2660
    Change-Id: Ieeca8a6afef917b6e3ba927d38ed5509dcaf253c
    Signed-off-by: tragait <rahul.tyagi@est.tech>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index e790144..5376a65 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit e790144fe2640e56715ce0912fb36ca70fb027b2
+Subproject commit 5376a65d586b37f13342f9e108f224b73d4149fc