Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 689837ddc374c33148e43bcaf64e5ea363928244
  - Fix grype location

    Change-Id: I72edaa9ff0e2e24dbef28e4e84a89ae9aecb4141
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5270df2..689837d 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5270df2d68de8b0469ed2b2e4e600e0d2d67ef96
+Subproject commit 689837ddc374c33148e43bcaf64e5ea363928244