Sync docker tags with release manifest

Sync docker tags with the release manifest from integration
repo commit 1e16c7e67d1fdeadab3789b07d6d2f47b7d0ffd7.

Change-Id: If580d0000108ce9ff70ad128b9bc93bf4364376b
Issue-ID: INT-663
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>
diff --git a/kubernetes/portal/charts/portal-sdk/values.yaml b/kubernetes/portal/charts/portal-sdk/values.yaml
index 772f191..63f7a49 100644
--- a/kubernetes/portal/charts/portal-sdk/values.yaml
+++ b/kubernetes/portal/charts/portal-sdk/values.yaml
@@ -28,7 +28,7 @@
 #################################################################
 # application image
 repository: nexus3.onap.org:10001
-image: onap/portal-sdk:2.3.0
+image: onap/portal-sdk:2.3.1
 pullPolicy: Always
 
 # flag to enable debugging - application support required