Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Support run dovetail CI jobs on fuel euphrates and master

    Change-Id: Iaf64316f8db351dd72f1ec1079953764f797dc3b
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 8bb5b1f..d8f30ed 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 8bb5b1f2154da334570c5791a6a9a8ad43e829af
+Subproject commit d8f30ed2d6f06774b0b0ae8ec8cf85906d0891ec