Maybe make example validator happy?

data/event-schemas/examples/m.call.answer.yaml

@@ -16,6 +16,6 @@
         "314159265358": {
             "purpose": "m.usermedia",
         },
-    },
+    }
   }
 }

data/event-schemas/examples/m.call.invite.yaml

@@ -17,6 +17,6 @@
         "314159265358": {
             "purpose": "m.usermedia",
         },
-    },
+    }
   }
 }

data/event-schemas/examples/m.call.negotiate.yaml

@@ -17,6 +17,6 @@
         "314159265358": {
             "purpose": "m.usermedia",
         },
-    },
+    }
   }
 }