Update sentence_bert_config.json

sentence_bert_config.json

@@ -1,10 +1,15 @@
-{
-    "transformer_task": "text-generation",
-    "modality_config": {
-        "message": {
-            "method": "forward",
-            "method_output_name": "logits"
-        }
-    },
-    "module_output_name": "causal_logits"
+{
+  "transformer_task": "text-generation",
+  "modality_config": {
+    "text": {
+      "method": "forward",
+      "method_output_name": "logits"
+    },
+    "message": {
+      "method": "forward",
+      "method_output_name": "logits"
+    }
+  },
+  "module_output_name": "causal_logits",
+  "message_format": "flat"
 }