Update git submodules

* Update docs/submodules/vnfrqts/requirements.git from branch 'master'
  to c221608db70b5fd0275c3ce77c250379c303c45c
  - Merge "Update the requirement R-30278 in VNFRQTS-594"
  - Update the requirement R-30278 in VNFRQTS-594

    Update the requirement R-30278 for clarification.

    Change-Id: I85bfbcd7886433d67742d13ec74641c2a70d0261
    Issue-ID: VNFRQTS-594
    Signed-off-by: fzhang <fei.zhang@ericsson.com>

diff --git a/docs/submodules/vnfrqts/requirements.git b/docs/submodules/vnfrqts/requirements.git
index d05e08c..c221608 160000 (submodule)
--- a/docs/submodules/vnfrqts/requirements.git
+++ b/docs/submodules/vnfrqts/requirements.git
@@ -1 +1 @@
-Subproject commit d05e08cf7f784a51f3b891921c267990d749fa90
+Subproject commit c221608db70b5fd0275c3ce77c250379c303c45c