Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Enable options for customizing deploy workflow

    Change-Id: I1011734895771fdaf653c59348a9ce0aeeff47a7
    Signed-off-by: Yujun Zhang <zhang.yujunz@zte.com.cn>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 4b2dfa5..a10b771 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 4b2dfa552656def5f56a48229705e79c5c7bcfca
+Subproject commit a10b7711ab3d400830406a2c425acb3431b4a5c1