Update git submodules

* Update docs/submodules/doctor from branch 'stable/danube'
  - Remove numbering

    Remove numbering from documents as its showing
    up in all headings in the composite documents.

    Change-Id: I6c0171868f3c70082a8a42e5a33514dfbddab1ba
    Signed-off-by: ShubhamRathi <shubhamiiitbackup@gmail.com>
    (cherry picked from commit 59fa00582f75a00a8bca8300659463a12023f80f)

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index efd6755..e827b25 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit efd6755aaa7ad0e7e2d105c4e75a3123cb48ad33
+Subproject commit e827b253fc4d22866775acb3b04a2c20da02019b