Switch ordering of *error* and *warning* in debug docs.

Error and Warning were incorrectly given each-other's descriptions. This change switches the sub-titles for each section.

tutorials/scripting/debug/output_panel.rst

@@ -23,9 +23,9 @@ Four message categories are available:
 
 - **Log:** Standard messages printed by the project. Displayed in white or black
   (depending on the editor theme).
-- **Error:** Messages printed by the project or editor that report important
+- **Warning:** Messages printed by the project or editor that report important
   information, but do not indicate a failure. Displayed in yellow.
-- **Warning:** Messages printed by the project or editor that indicate a failure
+- **Error:** Messages printed by the project or editor that indicate a failure
   of some kind. Displayed in red.
 - **Editor:** Messages printed by the editor, typically intended to be traces of
   undo/redo actions. Displayed in gray.