fix picky ruff issue

Author: Vargol

invokeai/backend/quantization/gguf/ggml_tensor.py

@@ -126,8 +126,8 @@ def to(self, *args, **kwargs):
         for func_arg in args:
             if isinstance(func_arg, torch.dtype) and func_arg != self.quantized_data.dtype:
                 raise ValueError("Operation changed the dtype of GGMLTensor unexpectedly.")
-        if 'dtype' in kwargs.keys():
-            if kwargs['dtype'] != self.quantized_data.dtype:
+        if "dtype" in kwargs.keys():
+            if kwargs["dtype"] != self.quantized_data.dtype:
                 raise ValueError("Operation changed the dtype of GGMLTensor unexpectedly.")
         self.quantized_data = self.quantized_data.to(*args, **kwargs)
         return self