Update git submodules

* Update docs/submodules/kvmfornfv from branch 'stable/danube'
  - Update documentation structure.

    This patch is used to update documentation structure.

    Change-Id: I50d4ef4256ccfc57a0434123e7532a50000582cf
    Co-Authored by:Srinivas <srinivas.atmakuri@tcs.com>
    Co-Authored by:RajithaY<rajithax.yerrumsetty@intel.com>
    Co-Authored by:shravani paladugula <shravanix.paladugula@intel.com>
    Co-Authored by:Navya Bathula <navyax.bathula@intel.com>
    Signed-off-by: Gundarapu Kalyan Reddy <reddyx.gundarapu@intel.com>
    (cherry picked from commit f1f3cc27f23bdde81c37d8142d4288d811bd5e45)

diff --git a/docs/submodules/kvmfornfv b/docs/submodules/kvmfornfv
index 9f34378..b04935b 160000 (submodule)
--- a/docs/submodules/kvmfornfv
+++ b/docs/submodules/kvmfornfv
@@ -1 +1 @@
-Subproject commit 9f343782f79512bb6423c973f591dcc90b63ab6b
+Subproject commit b04935b08394a9b64b69429215e27f0323065bfa