Update git submodules

* Update docs/submodules/bottlenecks from branch 'stable/danube'
  - Docs for Danube 3

    JIRA: BOTTLENECKS-137

    Documentation for Danube 3

    Change-Id: Ic4b2611028fa45c0b731e998296e5000e35a33f6
    Signed-off-by: yuyang <Gabriel.yuyang@huawei.com>
    (cherry picked from commit 38074a81bcb2a97bd59f274815dbfa67ab487c59)

diff --git a/docs/submodules/bottlenecks b/docs/submodules/bottlenecks
index 46bbb96..45d371c 160000 (submodule)
--- a/docs/submodules/bottlenecks
+++ b/docs/submodules/bottlenecks
@@ -1 +1 @@
-Subproject commit 46bbb96e0ea5f6555d893cd6f82ad7b52657dcbe
+Subproject commit 45d371c2a2d89231db9ffa892ce19da8f8b3cfa4