Update git submodules

* Update docs/submodules/joid from branch 'stable/euphrates'
  - release notes for 5.1

    Change-Id: I9c78a00fff2dce8efd0efd2879e932cc3298e578
    Signed-off-by: Narinder Gupta <narinder.gupta@canonical.com>

diff --git a/docs/submodules/joid b/docs/submodules/joid
index 9d1c95d..d99bef0 160000 (submodule)
--- a/docs/submodules/joid
+++ b/docs/submodules/joid
@@ -1 +1 @@
-Subproject commit 9d1c95d840ecaa9a40d1dda801f6234c0692121d
+Subproject commit d99bef0e896a2f9cb563787e4fd2b57654f7f4fa