Update git submodules

* Update docs/submodules/releng from branch 'master'
  to d8942f6fb6169a3cd830f3f3af2e2908dac2e6af
  - Fix slave in trivy jobs

    Change-Id: I38b7f49cccc53d0e2e679e35943825192e9fdcf8
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 94af9f4..d8942f6 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 94af9f4a754a396ad7b3c3ecfd2c01ccceb226a8
+Subproject commit d8942f6fb6169a3cd830f3f3af2e2908dac2e6af