Updates vim: 6ff8481 Change some key maps to avoid conflicts

diff --git a/modules/vim b/modules/vim
index d7b8ce234b78db0049e087fbca3d5b2df65abecb..6ff8481c7e6ee05c353ac46f11be85d877a0eb8e 160000 (submodule)
--- a/modules/vim
+++ b/modules/vim
@@ -1 +1 @@
-Subproject commit d7b8ce234b78db0049e087fbca3d5b2df65abecb
+Subproject commit 6ff8481c7e6ee05c353ac46f11be85d877a0eb8e