Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to 2f1d6225bef920a217a25441b7dcaeb457113dc5
  - enabled NFV Affinity and Anti-affinity Rules

    Fix the issue tosca.policies.nfv.AffinityRule and tosca.policies.nfv.AntiAffinityRule which was getting failed at first attempt with 404 error

    Change-Id: I6630193343729051b41e4eb880832dee85b098ee
    Issue-ID: SDC-2231
    Signed-off-by: sarada prasad sahoo <sarada.prasad.sahoo@huawei.com>

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 3f1f8e8..2f1d622 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 3f1f8e80daac1f28adb53a96e211170b5b45dda6
+Subproject commit 2f1d6225bef920a217a25441b7dcaeb457113dc5