Ficed wrong name

Author: JeanLucPons

tests/dummy_cs/tango/tango/pyaml/attribute_read_only.py

@@ -31,10 +31,10 @@ def measure_name(self) -> str:
         return self._readback
 
     def set(self, value: float):
-        raise Exception(f"{self._cfg.name} is read only attribute")
+        raise Exception(f"{self._cfg.attribute} is read only attribute")
 
     def set_and_wait(self, value: float):
-        raise Exception(f"{self._cfg.name} is read only attribute")
+        raise Exception(f"{self._cfg.attribute} is read only attribute")
 
     def get(self) -> float:
         return self._cache