Add the missing titles to the schema

event-schemas/schema/v1/core-event-schema/event.json

@@ -5,6 +5,7 @@
   "properties": {
     "content": {
       "type": "object",
+      "title": "EventContent",
       "description": "The fields in this object will vary depending on the type of event. When interacting with the REST API, this is the HTTP body."
     },
     "type": {

event-schemas/schema/v1/core-event-schema/state_event.json

@@ -11,6 +11,7 @@
       "description": "A unique key which defines the overwriting semantics for this piece of room state. This value is often a zero-length string. The presence of this key makes this event a State Event. The key MUST NOT start with '_'."
     },
     "prev_content": {
+      "title": "EventContent",
       "type": "object",
       "description": "Optional. The previous ``content`` for this event. If there is no previous content, this key will be missing."
     }

event-schemas/schema/v1/m.room.member

@@ -8,6 +8,7 @@
     "properties": {
         "content": {
             "type": "object",
+            "title": "EventContent",
             "properties": {
                 "membership": {
                     "type": "string",