content: change hint in L23P2 that suggests a function introduced in …

…the following lesson

course/lesson-23-append-to-arrays/lesson.tres

@@ -295,7 +295,7 @@ func run():
 	while "
 cursor_line = 0
 cursor_column = 0
-hints = PoolStringArray( "Remember [code]while[/code] loops\? ", "Every time you [code]pop[/code] an item, the array\'s [code]size[/code] gets reduced", "Try [code]while crates.size() > 0[/code]" )
+hints = PoolStringArray( "Remember [code]while[/code] loops\? ", "Every time you [code]pop[/code] an item, the array\'s [code]size[/code] gets reduced", "You can write [code]while crates:[/code] to run code in a loop while there are values in the [code]crates[/code] array." )
 validator_script_path = "res://course/lesson-23-append-to-arrays/popping-crates/TestPoppingCrates.gd"
 script_slice_path = "res://course/lesson-23-append-to-arrays/popping-crates/PoppingCrates.live-editor/slices/PoppingCrates.run.slice.tres"
 documentation_references = PoolStringArray( "array.pop_back" )