Update git submodules

* Update docs/submodules/doctor from branch 'stable/fraser'
  - Doctor releasenotes Fraser 6.2

    Change-Id: I18625dc03f050e2d424cfcd1bd10534647db5525
    Signed-off-by: Tomi Juvonen <tomi.juvonen@nokia.com>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index c91aa72..7fda374 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit c91aa72e7df34ec3416be3c9f73f7484a91312fb
+Subproject commit 7fda374ace0122200146a60c422019399884d9b7