Update git submodules

* Update docs/submodules/dovetail from branch 'stable/fraser'
  - Updating the link to the updated participation form

    Updating all links to the new participation form.

    Change-Id: I41811fff3516ed5c8c91fbee16a3b50d432258d4
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>
    (cherry picked from commit a22995bcb5e7be1ca0273c46af5c32f6d3d53225)

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 83375bd..f19475c 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 83375bd73319c64ff8bfc6206753123b80f07b6a
+Subproject commit f19475c6c64c8401b896aa6f34ce06f914476fdc