Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "xci: Use custom-url for readable CI reports"
  - xci: Use custom-url for readable CI reports

    Change-Id: I97d8fac47ec25414045a7761b651019f9f89224f
    Signed-off-by: Markos Chandras <mchandras@suse.de>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index d7904f6..c633e80 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit d7904f63223f10c356c9d2154ddc1827dd4f2982
+Subproject commit c633e80356bb3b57d7cf337607cf61eab01908f9