Update git submodules

* Update docs/submodules/pharos from branch 'master'
  - Merge "Fix Booking API"
  - Fix Booking API

    This fixes a server error for the booking REST api and some html errors.

    Change-Id: I86475967bbc8cd4c8f82f62e03789f1c9752d446
    Signed-off-by: maxbr <maxbr@mi.fu-berlin.de>

diff --git a/docs/submodules/pharos b/docs/submodules/pharos
index aa88673..8d34f96 160000 (submodule)
--- a/docs/submodules/pharos
+++ b/docs/submodules/pharos
@@ -1 +1 @@
-Subproject commit aa88673c38be12368dead5e8241fb915d790c431
+Subproject commit 8d34f96fb1ed9bf34ad3da17048e1e29f71106ed