fix messages json

Sample Data/Custom/ABNORMAL_THREAT_MESSAGES_CL.json

@@ -1059,7 +1059,7 @@
         "attachmentNames": [],
         "attachmentCount": 0,
         "urls": [
-            "https://connect.wdc.com/docs/DOC-438723",
+            "https://connect.wdc.com/docs/DOC-438723"
         ],
         "urlCount": 2,
         "summaryInsights": [
@@ -1097,7 +1097,7 @@
         "attachmentCount": 0,
         "urls": [
             "https://connect.wdc.com/docs/DOC-438723",
-            "https://acforless.com/ceo/index.php",
+            "https://acforless.com/ceo/index.php"
         ],
         "urlCount": 4,
         "summaryInsights": [