Update git submodules

* Update docs/submodules/opera from branch 'master'
  - Merge "doc adjust"
  - doc adjust

    change doc structrue

    Change-Id: I66bea1f0a922930f0407dc04898fbb410d9305e9
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>

diff --git a/docs/submodules/opera b/docs/submodules/opera
index 7921973..32c1a6e 160000 (submodule)
--- a/docs/submodules/opera
+++ b/docs/submodules/opera
@@ -1 +1 @@
-Subproject commit 79219733ea099837d77bf851adde66f6e06c1b5e
+Subproject commit 32c1a6ee6d726d4278869abe718e7fcb61614bc7