Update the doctest

Author: PProfizi

src/ansys/dpf/core/workflow.py

@@ -1039,7 +1039,7 @@ def required_plugins(self) -> list[str]:
         Returns
         -------
         plugins:
-            List of plugins used by the workflow.
+            List of plugins used by the workflow ordered alphabetically.
             The plugin name reported is the one set when loading the plugin.
 
         Examples