Update git submodules

* Update docs/submodules/apex from branch 'stable/euphrates'
  - Merge "corrected the path for executing dev_dep_check script" into stable/euphrates
  - corrected the path for executing dev_dep_check script

    Change-Id: I9291aaddd370c1304b4aba3c90298c8e4d291e59
    Signed-off-by: Periyasamy Palanisamy <periyasamy.palanisamy@ericsson.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 9697719..4773a61 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 96977197df5ad0be9fea91ce17d332288fdbbf09
+Subproject commit 4773a61c540fcd2e5195abfa467122613ab30728