Docs: Change doc status to 'Accepted'

The status of this doc keeps 'Detailed', fix it.

Change-Id: I4437350c5a75c38b6e80413605cac1bb6a44c3e4
Signed-off-by: Ken Liu <ken.liu@arm.com>
diff --git a/docs/design_documents/tfm_cooperative_scheduling_rules.rst b/docs/design_documents/tfm_cooperative_scheduling_rules.rst
index c65532a..b1c4e76 100644
--- a/docs/design_documents/tfm_cooperative_scheduling_rules.rst
+++ b/docs/design_documents/tfm_cooperative_scheduling_rules.rst
@@ -5,7 +5,7 @@
 :Author: Ashutosh Singh
 :Organization: Arm Limited
 :Contact: Ashutosh Singh <ashutosh.singh@arm.com>
-:Status: Detailed
+:Status: Accepted
 
 TF-M Scheduler - Rules
 ======================