Update git submodules

* Update docs/submodules/snaps from branch 'stable/euphrates'
  - Updated from global requirements

    Change-Id: Ib52ff2a6cdbd1563dae26c7f8d74da825e499d68
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 59fd6c8..2a09f41 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 59fd6c8062c03d081193ddbb71d84c8897c48ffc
+Subproject commit 2a09f4166562c1a91410a246d4ab08f0d5d71039