Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - [ovp-web] Modify new web portal header to reflect program name change

    JIRA: DOVETAIL-569

    CVP is officially being renamed to 'OPNFV Verified Program'. We will
    adopt the acronym OVP instead of CVP. The new web portal header needs to
    modified to OPNFV Verified Program.

    Change-Id: I0ee1780b4e544dce4cf0b029733d1318a7c4e8fb
    Signed-off-by: grakiss <grakiss.wanglei@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index c94df5d..b28552a 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit c94df5dc491cff80bfa14cf1e66b62db48e05b01
+Subproject commit b28552a3fce6b4cb900823a0645cac7731451042