Update adafruit_mlx90393.py

Fix copy and paste typo

Author: brian-eng

adafruit_mlx90393.py

@@ -422,7 +422,7 @@ def temperature_oversampling(self) -> int:
         """The temperature sensor oversampling level."""
         return self._osr2
 
-    @oversampling.setter
+    @temperature_oversampling.setter
     def temperature_oversampling(self, level: int) -> None:
         if level not in range(4):
             raise ValueError("Incorrect oversampling level.")