Update git submodules

* Update docs/submodules/vnfsdk/model.git from branch 'master'
  to 59153e141e945c221fecbc06cb80cfea10e40817
  - Merge "Automation adds release-notes.rst"
  - Automation adds release-notes.rst

    Add _release_notes hook to allow automation.
    Fix non valid release notes characters in content.

    Issue-ID: CIMAN-376
    Change-Id: Ida0f159c849e997fd965a77331b73fe9eff97231
    Signed-off-by: lf-jobbuilder <releng+lf-jobbuilder@linuxfoundation.org>

diff --git a/docs/submodules/vnfsdk/model.git b/docs/submodules/vnfsdk/model.git
index 8ce5dc0..59153e1 160000 (submodule)
--- a/docs/submodules/vnfsdk/model.git
+++ b/docs/submodules/vnfsdk/model.git
@@ -1 +1 @@
-Subproject commit 8ce5dc08d9e9c1c6719ce87138fa3a9d63a0f3d1
+Subproject commit 59153e141e945c221fecbc06cb80cfea10e40817