chg: add impact field to vulnerability object type

Author: Wachizungu

objects/vulnerability/definition.json

@@ -81,6 +81,11 @@
       "misp-attribute": "text",
       "ui-priority": 0
     },
+    "impact": {
+      "description": "Impact of the vulnerability",
+      "misp-attribute": "text",
+      "ui-priority": 0
+    },
     "vulnerable-configuration": {
       "description": "The vulnerable configuration is described in CPE format",
       "misp-attribute": "cpe",
@@ -102,5 +107,5 @@
     "payload"
   ],
   "uuid": "81650945-f186-437b-8945-9f31715d32da",
-  "version": 10
-}
+  "version": 11
+}