Update git submodules

* Update docs/submodules/auto from branch 'master'
  - docs: Fix long lines

    OPNFVDOCS scripts set max line length to 240 chars. This patch
    shortens long lines to avoid rst validation warnings during Auto
    docs generation.

    Change-Id: I124e3ea3aa04bc7fc8c2f5cf25ce9c75fdcef330
    Signed-off-by: Martin Klozik <martin.klozik@tieto.com>

diff --git a/docs/submodules/auto b/docs/submodules/auto
index f19ad7f..bf21f30 160000 (submodule)
--- a/docs/submodules/auto
+++ b/docs/submodules/auto
@@ -1 +1 @@
-Subproject commit f19ad7f768a1fd6f7523a8e418b30bce2088ebce
+Subproject commit bf21f3086791419abd713757ec85d0b9a77312d5