bump to 5.6.3

contrib/aws/Dockerrun.aws.json

@@ -92,7 +92,7 @@
         },
         {
             "name": "web",
-            "image": "mattermost/mattermost-prod-web:latest",
+            "image": "mattermost/mattermost-prod-web:5.6.3",
             "memory": 128,
             "essential": true,
             "mountPoints": [

contrib/kubernetes/mattermost.deployment.yaml

@@ -17,7 +17,7 @@ spec:
     spec:
       containers:
       - name: mattermost-app
-        image: "mattermost/mattermost-prod-app:5.6.2"
+        image: "mattermost/mattermost-prod-app:5.6.3"
         env:
         - name: DB_HOST
           valueFrom: