Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - CI ERROR - File contains violation on test_runner

    Proposed solution by CI server:
    "Avoid dangerous file parsing & serialization libs, use yaml.safe_load"

    Change-Id: Iff9764601bc135cec271e16444d0bbbb4da8d459
    Signed-off-by: Panagiotis Karalis <pkaralis@intracom-telecom.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 9d68899..29b70b6 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 9d688995687a701ac1b5572e74b6c028885c92ea
+Subproject commit 29b70b6da1cbae16f6c6332e54ac146c8a2fc106