Add AlertTitle to rule_jsonschema.json

#1356 added new sublime rules and several had `AlertTitle` defined in their yamls.

Like #1306, adding AlertTitle to the schema.

.vscode/rule_jsonschema.json

@@ -5,6 +5,9 @@
 
   "type": "object",
   "properties": {
+    "AlertTitle": {
+      "$ref": "#/definitions/AlertTitle"
+    },
     "AnalysisType": {
       "$ref": "#/definitions/AnalysisType"
     },
@@ -85,6 +88,12 @@
     }
   ],
   "definitions": {
+    "AlertTitle": {
+      "$comment": "https://docs.panther.com/detections/rules/writing-simple-detections#alerttitle",
+      "description": "Use AlertTitle to dynamically set the title of an alert generated by a match on this detection.",
+      "type": "string",
+      "default": "rule"
+    },
     "AnalysisType": {
       "description": "what kind of detection",
       "type": "string",