Update git submodules

* Update docs/submodules/releng from branch 'master'
  to 8926bed5e65858df6a3d4dd2e2ffda339adf5aab
  - [barometer] remove stable/{gambia,hunter} jobs

    Signed-off-by: Emma Foley <efoley@redhat.com>
    Change-Id: I20f2a6299cbd09ac2e3a22d17df097f65c71a8dd

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 030ba95..8926bed 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 030ba95349f352bf491dcbb9e713d7b307519ae1
+Subproject commit 8926bed5e65858df6a3d4dd2e2ffda339adf5aab