Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Update user guide

    Change-Id: I595975d13630c81c5d15ac0051225143d0394ba4
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 06a0a8f..f170bf4 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 06a0a8f2bd8ee7ce7db154c54301ec986b93b89f
+Subproject commit f170bf4205fd75db96b84a685b931904f4dbab93