Update git submodules

* Update docs/submodules/barometer from branch 'stable/danube'
  - docs: finalize userguide for Danube

    Change-Id: Ie6ee71f079898eeb938db43b6542431cfda05875
    Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>

diff --git a/docs/submodules/barometer b/docs/submodules/barometer
index 9b39e55..00c2010 160000 (submodule)
--- a/docs/submodules/barometer
+++ b/docs/submodules/barometer
@@ -1 +1 @@
-Subproject commit 9b39e554e118a8ad26b4d8966b660d65a003367f
+Subproject commit 00c20103864c255c0129db11dd27b4a8dd5465d4