Update git submodules

* Update docs/submodules/releng from branch 'master'
  to c84463cdf20e27deba830418a7f2ff1b90a4c627
  - Merge "Fix DIB_RELEASE to bookworm"
  - Fix DIB_RELEASE to bookworm

    The following diskimage-builder's patch hasn't still be released
    https://opendev.org/openstack/diskimage-builder/commit/93442d09cff0eadfc18b17793c24789dac094600

    Change-Id: I0406d20455aee2677193e2460d24a8c80ac90169
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f0b4073..c84463c 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f0b407325a309f00cb962128c7639ee1353bb25c
+Subproject commit c84463cdf20e27deba830418a7f2ff1b90a4c627