MLBEDSW-3285: AttributeError Tensor has no attribute

 - Fixed typo in Tensor.is_quantized()

Signed-off-by: Tim Hall <tim.hall@arm.com>
Change-Id: I36156a6aa5aaff01c4f271a6a8325636173225f3
diff --git a/ethosu/vela/tensor.py b/ethosu/vela/tensor.py
index 84af8ed..4110fa6 100644
--- a/ethosu/vela/tensor.py
+++ b/ethosu/vela/tensor.py
@@ -800,7 +800,7 @@
         if (self.dtype.type & BaseType.Int) == 0 or self.quantization is None:
             return False
 
-        assert isinstance(self.quantisation, QuantizationParameters)
+        assert isinstance(self.quantization, QuantizationParameters)
         assert self.quantization.is_valid()
 
         return True