Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 39feb25a146741ed445dad3d82e981af5bb9d2df
  - Merge "Use diamond op in place of type spec"
  - Use diamond op in place of type spec
    
    Use diamond op in place of type spec MSOCommonBPMN classes
    
    Issue-ID: SO-2187
    
    Signed-off-by: sindhu3672 <arcot.sindhuri@huawei.com>
    Change-Id: I8812392bbc6eac6d703ff7eeabf8e95806aab442
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index d652e65..39feb25 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit d652e65a43f3236abc30d55b040e13716aefe3a5
+Subproject commit 39feb25a146741ed445dad3d82e981af5bb9d2df