Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[noha] Bring in gnocchi/panko services"
  - [noha] Bring in gnocchi/panko services

    JIRA: FUEL-372
    Change-Id: I4e322a4a2c84843e9350fe9b3b849cd0c5244a12
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 385b39e..fde6463 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 385b39e529434d39ac19985a5f5624f1cdbef425
+Subproject commit fde64636e043bd54057987f3850c784723cd32fc