[Bugfix] Fix MoE BNB version (#22260)

Signed-off-by: Jee Jee Li <pandaleefree@gmail.com>

vllm/model_executor/layers/quantization/bitsandbytes.py

@@ -412,12 +412,12 @@ class BitsAndBytesMoEMethod(FusedMoEMethodBase):
     def __init__(self, quant_config: BitsAndBytesConfig):
         try:
             import bitsandbytes
-            if bitsandbytes.__version__ < "0.45.3":
+            if bitsandbytes.__version__ < "0.46.1":
                 raise ImportError("bitsandbytes version is wrong. Please "
-                                  "install bitsandbytes>=0.45.3.")
+                                  "install bitsandbytes>=0.46.1.")
         except ImportError as err:
-            raise ImportError("Please install bitsandbytes>=0.45.3 via "
-                              "`pip install bitsandbytes>=0.45.3` to use "
+            raise ImportError("Please install bitsandbytes>=0.46.1 via "
+                              "`pip install bitsandbytes>=0.46.1` to use "
                               "bitsandbytes quantizer.") from err
         self.topk_indices_dtype = None
         self.quant_config = quant_config