Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [baremetal] Fix openstack_compute_pdf yaml err

    Fixes: 7c79115

    Change-Id: I62f52382b297b1aa9cfc37f74f04a00872ead1ef
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index d8cf4a9..8b48875 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit d8cf4a9b8fb25af7fed10b8b9e69f70b601ccbce
+Subproject commit 8b48875e30afa4c60f27310df548a18c18e9af60