Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[ha] AArch64: Add missing GPG key for armband repo"
  - [ha] AArch64: Add missing GPG key for armband repo

    In a regular baremetal HA scenario, all cluster nodes are provisioned
    via MaaS, which also adds the Enea GPG key to the APT keyring.
    However, for a hybrid deployment, virtual nodes are not provisioned
    by MaaS, so the GPG key should be added to reclass pillar data
    explicitly for Salt to be able to import it.

    JIRA: FUEL-338

    Change-Id: I333b7c373bdbc631c0f54ac549f97ab889dec77c
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 6269b9f..a22fa43 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 6269b9ffce8c730eba2a4037075484e007c010b8
+Subproject commit a22fa43a8addbbcdd8d0f3b8d0a617fddf1cd4e7