Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Changing the link to the updated participation form

    The participation form on docusign has changed due to incorporating
    additional fields for the API validation exemption. This patch updates
    the links in the documentation accordingly.

    Note: this patch should only me merged after the new form is online.

    Change-Id: I697fa13d9afe2797faba2bf0478bbf27820bca20
    Signed-off-by: Georg Kunz <georg.kunz@ericsson.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 46f4c2a..3c0569b 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 46f4c2ab5fc870f424e8f74a179ec3bea2c96537
+Subproject commit 3c0569b1e16f35d4b14a60ed25113d6d7a398272