Update git submodules

* Update docs/submodules/releng-xci from branch 'master'
  - Merge "Update .gitignore for documentation"
  - Update .gitignore for documentation

    Change-Id: I39a8b8a874345f90cd60f34ca10422b20f66e32b
    Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>

diff --git a/docs/submodules/releng-xci b/docs/submodules/releng-xci
index 1691ce3..869ae6c 160000 (submodule)
--- a/docs/submodules/releng-xci
+++ b/docs/submodules/releng-xci
@@ -1 +1 @@
-Subproject commit 1691ce30b5bb71c07dd31c1aaaea73cd6418b395
+Subproject commit 869ae6cb904098b53da9bba010b1a9c95749c05d