Update git submodules

* Update docs/submodules/so.git from branch 'elalto'
  to 209f74a1f0cfb379befb7cba7875b92e631e25a1
  - bump the SO elalto version to handle the logging issues
    
    Issue-ID: SO-3046
    
    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: Ie317547d009c0c7670116bcb3df85f58b49b5db9
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 6cf18e5..209f74a 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 6cf18e59f1f7fc94bcae27785dc9a17008324fa8
+Subproject commit 209f74a1f0cfb379befb7cba7875b92e631e25a1