Update git submodules

* Update docs/submodules/dovetail from branch 'stable/fraser'
  - Reviewers Guide document for fraser release.

    Images have been updated to depict the latest changes
    in Dovetail Web portal.

    Change-Id: I4dc928141856fab34670272fcc465bea3f6156db
    Signed-off-by: dimitris.tsiolakis <dmts@intracom-telecom.com>
    (cherry picked from commit cfa402bae022e7e288f9d9eaa3582f22fd39c42e)

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 16e36ed..83375bd 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 16e36edaec487300f1dd154110077d499bf7726e
+Subproject commit 83375bd73319c64ff8bfc6206753123b80f07b6a