Update config.json

config.json

@@ -1,6 +1,7 @@
 {
   "activation_dropout": 0.1,
   "activation_function": "gelu",
+  "add_cross_attention": false,
   "architectures": [
     "ProphetNetForCausalLM"
   ],
@@ -51,4 +52,4 @@
     }
   },
   "vocab_size": 30522
-}
+}