Update git submodules

* Update docs/submodules/compass4nfv from branch 'stable/danube'
  - Merge "Update the release-note for Danube 3.0" into stable/danube
  - Update the release-note for Danube 3.0

    1. add new features
    2. add bug fix

    Change-Id: I96a654cc3ded647d71e7c283c5ef0f871ab5673c
    Signed-off-by: Yifei Xue <xueyifei@huawei.com>

diff --git a/docs/submodules/compass4nfv b/docs/submodules/compass4nfv
index f9d5aac..f746dc4 160000 (submodule)
--- a/docs/submodules/compass4nfv
+++ b/docs/submodules/compass4nfv
@@ -1 +1 @@
-Subproject commit f9d5aacba1ce6a2fdc3f5ef71a82550cec3812ae
+Subproject commit f746dc455a3bdbb3c4f03da5a9a19ebbf66d7c06