doc: security/etsi: Provision 5.9.2 assessment

Add self-assessment for provision 5.9.2

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

doc/security/standards/etsi-303645.rst

diff --git a/doc/security/standards/etsi-303645.rst b/doc/security/standards/etsi-303645.rst
index 84e10c5..5527569 100644
--- a/doc/security/standards/etsi-303645.rst
+++ b/doc/security/standards/etsi-303645.rst
@@ -603,7 +603,7 @@
         loss of network access and should recover cleanly in the case of restoration of a
         loss of power.
       - R
-      -
+      - Y
       -
 
         .. _ETSI_Provision_5_9_3: