Update git submodules

* Update docs/submodules/appc/deployment.git from branch 'master'
  to 981457eaf23722fe1d0a9d4c79eb716a37359f8a
  - Update version of node base image

    Changing the version of the cdt base image to be 13-alpine
    so that we can get updates within the 13 version as they
    become available. This insures we get all security updates.

    Change-Id: I514958ca2f9558908b8a74f80d53abb2e5b72911
    Signed-off-by: Patrick Brady <patrick.brady@att.com>
    Issue-ID: APPC-1838

diff --git a/docs/submodules/appc/deployment.git b/docs/submodules/appc/deployment.git
index 29fccc3..981457e 160000 (submodule)
--- a/docs/submodules/appc/deployment.git
+++ b/docs/submodules/appc/deployment.git
@@ -1 +1 @@
-Subproject commit 29fccc362781087559262a16d87ab7e2ae9f7f46
+Subproject commit 981457eaf23722fe1d0a9d4c79eb716a37359f8a