Update quantize_config.json

quantize_config.json

@@ -549,5 +549,10 @@
     "bnb4": {
         "block_size": 64,
         "quant_type": 1
+    },
+    "q4": {
+        "block_size": 32,
+        "is_symmetric": true,
+        "accuracy_level": null
     }
 }