Update config.json

Make minimum viable config.json

config.json

@@ -1,2 +1,9 @@
 {
-}
+  "architectures": [
+    "AfmoeForCausalLM"
+  ],
+  "n_layers": 1,
+  "vocab_size": 200192,
+  "hidden_size": 3,
+  "num_attention_heads": 4
+}