Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Add reason for stack creation failure"
  - Add reason for stack creation failure

    JIRA: SNAPS-190

    Change-Id: I59b7d416ef16cd1f301ccbdcdd8a7529527b3dd6
    Signed-off-by: Taseer Ahmed <taseer94@gmail.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index d5d282d..7766bd2 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit d5d282dd1ffab96e85332bea580689c3297a25f8
+Subproject commit 7766bd2f8ef5f7ddb9ee231179bb38023d65a972