Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Add path for QTIP docs

    This file will serve as the index page of QTIP isolated documentation
    on qtip.readthedoc.org and docs.qtip.io

    Change-Id: I34315e62847bc1bdc970db9b400138c3640c9ed5
    Signed-off-by: akhilbatra898 <akhil.batra@research.iiit.ac.in>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index 1bcbfb8..187b7b7 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit 1bcbfb8a99e0a42bb6d5b87ade3ec15fcddc4bf7
+Subproject commit 187b7b7843d4d5071311abd3c001df91b6f469be