fix docuemtn bugs to show ric-app-ad document

Signed-off-by: weichen <niweichen@chinamobile.com>
Change-Id: I756360d273b595fb11f9dfd0eaea686bf3c05b0e
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 598c4f8..8799059 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -26,7 +26,10 @@
 | 2020-06-21         | Bronze             | CMCC               | Bronze Release     |
 |                    |                    |                    |                    |
 +--------------------+--------------------+--------------------+--------------------+
+| 2020-12-21         | Cherry             | CMCC               | Cherry Release     |
 |                    |                    |                    |                    |
++--------------------+--------------------+--------------------+--------------------+
+| 2021-07-15         | Dawn 	          | CMCC               | Dawn Release       |
 |                    |                    |                    |                    |
 +--------------------+--------------------+--------------------+--------------------+
 
@@ -74,6 +77,12 @@
 * :doc:`RIC Measurement Campaign (MC) xApp Release-notes <ric-app-mc:release-notes>`
 
 
+Anomaly Detection (AD) is an xApp in the Traffic Steering O-RAN use case.
+
+* :doc:`Anomaly Detection xApp Release-notes <ric-app-ad:release-notes>`
+
+
+
 
 Near Realtime RAN Intelligent Controller (RIC) features
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^