Update git submodules

* Update docs/submodules/ovn4nfv from branch 'stable/fraser'
  - Type Error correction in release notes.

    Change-Id: I8611ce78b8d68cdfd6ee0fa941c831f0d729ff19
    Signed-off-by: Trinath Somanchi <trinath.somanchi@nxp.com>
    (cherry picked from commit e0963ba77b7a4c01215a672e5f3606751912065a)

diff --git a/docs/submodules/ovn4nfv b/docs/submodules/ovn4nfv
index 1dab959..651acb6 160000 (submodule)
--- a/docs/submodules/ovn4nfv
+++ b/docs/submodules/ovn4nfv
@@ -1 +1 @@
-Subproject commit 1dab9595b7665685d363272079c58c9fbbf850a8
+Subproject commit 651acb603c2f4523905e4fe5134fd8a7940e1f3d