Update git submodules

* Update docs/submodules/multisite from branch 'master'
  - Change auth_uri in kingbird conf.

    In the present multisite code auth_uri is not set
    correctly.Removed hardcode value 'v3'.

    Change-Id: I407a5ee9b870a460ce1c2161b8cb38fd05800c52
    Signed-off-by: Goutham Pratapa <pratapagoutham@gmail.com>

diff --git a/docs/submodules/multisite b/docs/submodules/multisite
index 42f3a33..d77a9e7 160000 (submodule)
--- a/docs/submodules/multisite
+++ b/docs/submodules/multisite
@@ -1 +1 @@
-Subproject commit 42f3a336b2c0344f2cdd09c443ad56922263d00d
+Subproject commit d77a9e76f8814d97b754e0e329e7dafecf6531ac