Update git submodules

* Update docs/submodules/armband from branch 'master'
  - Revert "p/fuel: network: public: Use arm-virtual2 POD cfg"

    This reverts commit 779c0cc56646da234019577e17f4af378a205e08.

    Change-Id: Ia5261da363579e7bec442ada58ca16635025f872

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 779c0cc..28b86f8 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 779c0cc56646da234019577e17f4af378a205e08
+Subproject commit 28b86f89f750d93a4e7c995f4b931ad004f11f8e