Update missingProperties.json file (#173)

Co-authored-by: badmintoncryer <badmintoncryer@users.noreply.github.com>

Author: github-actions[bot]

frontend/app/missingProperties.json

@@ -898,6 +898,7 @@
       "reputationOptions.reputationMetricsEnabled",
       "sendingOptions.sendingEnabled",
       "suppressionOptions.suppressedReasons",
+      "suppressionOptions.validationOptions",
       "trackingOptions.customRedirectDomain",
       "trackingOptions.httpsPolicy",
       "vdmOptions.dashboardOptions",
@@ -1228,6 +1229,7 @@
     "module": "aws-rds",
     "name": "CfnDBInstance",
     "missingProps": [
+      "additionalStorageVolumes",
       "allocatedStorage",
       "allowMajorVersionUpgrade",
       "applyImmediately",