Update git submodules

* Update docs/submodules/releng from branch 'master'
  - releng-macros: Update & adopt email-fuel-ptl

    Change-Id: I24cc328cdefcd7ac5f34292f0cf1635f797f8f00
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index e5550dd..d409853 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit e5550dd9216ca961f26662de0d379f116d74e89f
+Subproject commit d409853531925fa77ad902af24522a00e4415f6f