Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to f1922cef9735e44b3e5116e86a89c7e2449b1ce1
  - Refactor method 'undoCheckout' to simplify it and remove potential NPE

    - Extracted methods 'retrieveAndUpdatePreviousVersion' and 'updateEdgeToCatalogRootAndReturnPreVersionElement' from 'undoCheckout'

    Issue-ID: SDC-2965
    Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
    Change-Id: I52faffdaf2e99a9de8c2e566da26a5be6e7fd667

diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 8a5f3ae..f1922ce 160000 (submodule)
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 8a5f3aebc6b5681c5c44307b7a0cdf868802e790
+Subproject commit f1922cef9735e44b3e5116e86a89c7e2449b1ce1