Update git submodules

* Update docs/submodules/armband from branch 'stable/danube'
  - docs: cleanup: amend kernel section

    Change-Id: I4a0a062d2ea8157bb16b724b09acda8724f29960
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit e2c57098e2a23c05a0f0a17d59059cd3425bfa9a)

diff --git a/docs/submodules/armband b/docs/submodules/armband
index 84315d2..fe4c458 160000 (submodule)
--- a/docs/submodules/armband
+++ b/docs/submodules/armband
@@ -1 +1 @@
-Subproject commit 84315d2f112e7e90e0d24199834715681cf8c279
+Subproject commit fe4c45869250c610452a143815a7156270c71020