Update git submodules

* Update docs/submodules/joid from branch 'stable/euphrates'
  - Corrected reference for scenario doc

    Change-Id: I1459b0056bf0934d4c62d6840e070017690bc759
    Signed-off-by: Sofia Wallin <sofia.wallin@ericsson.com>
    (cherry picked from commit 470472f807b118b235d7ff473a3e58bfaf8c293d)

diff --git a/docs/submodules/joid b/docs/submodules/joid
index 6fb7190..520f921 160000 (submodule)
--- a/docs/submodules/joid
+++ b/docs/submodules/joid
@@ -1 +1 @@
-Subproject commit 6fb71904320441a82e3ca89ce3c10687627b820d
+Subproject commit 520f921f6e3bd2ab38c385511662f7631461bd0b