Update mend config to allow remediation (#5287)

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>
(cherry picked from commit 5450b4c)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.whitesource

@@ -11,5 +11,11 @@
   },
   "issueSettings": {
     "minSeverityLevel": "LOW"
+  },
+  "remediateSettings": {
+    "addLabels": ["skip-changelog"],
+    "workflowRules": {
+      "enabled": true
+    }
   }
-}
+}