Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[dovetail] add gambia jobs"
  - [dovetail] add gambia jobs

    Change-Id: I84e29a6d1ffaed59b2490f4c2e417c0456eb2ca7
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 3e20463..73ff265 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 3e20463ce41c2478c1c9234287e5b5bbefb8d5ed
+Subproject commit 73ff265dcde2bd5081492598171cb289bccaf35b