clearer error message

Author: topper-123

pandas/core/apply.py

@@ -1088,8 +1088,9 @@ def apply_standard(self) -> DataFrame | Series:
 
         if len(mapped) and isinstance(mapped[0], ABCSeries):
             warnings.warn(
-                "converting list of Series to a DataFrame in the Series.apply method "
-                "is deprecated and will be removed in a future version.",
+                "Returning a DataFrame from Series.apply when the supplied function"
+                "returns a Series is deprecated and will be removed in a future "
+                "version.",
                 FutureWarning,
                 stacklevel=find_stack_level(),
             )  # GH52116