Update git submodules

* Update docs/submodules/snaps from branch 'stable/fraser'
  - Conform ProjectConfig args with description

    Change-Id: Ib865fdc6d48c377c5a28092015b807ef79a15ce3
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 816a90ca79a0f16bd5176b00c33391f522e517c1)

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index d9f6029..81d21bf 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit d9f602981b0e695504061ba7a9862ec53082b82a
+Subproject commit 81d21bfc84084f7b4a2d6a45a8979ea1f947b103