content: Add a documentation entry for the align function in L23.P2

close #1087

Author: NathanLovato

course/documentation.csv

@@ -24,3 +24,4 @@ int,int,,"Returns the argument converted into an [code]int[/code] (whole number)
 place_unit,,"cell: Vector2, unit_type: String","Creates a new unit matching the type parameter and places it at the desired cell position on the game grid.",method,
 display_item,,"item: String, amount: int","Creates a new item and displays it in the inventory.",method,
 add_item,,"item: String, amount: int","Increases the item count by amount.",method,
+align,,"track","Realigns the train track with the path. Select a train track in the tracks array by index to pass it as an argument.",method,

course/lesson-24-access-array-indices/lesson.tres

@@ -260,7 +260,7 @@ cursor_column = 0
 hints = PoolStringArray( "The syntax to access an item by index in an array uses square brackets with a number in between right after the array name. For example, write [code]tracks[-1][/code] to access the [i]last[/i] element in the array.", "To align the second chunk, call [code]align(tracks[-3])[/code]. You need to call the same function another two times with the other chunks." )
 validator_script_path = "res://course/lesson-24-access-array-indices/align-tracks/TestAlignTracks.gd"
 script_slice_path = "res://course/lesson-24-access-array-indices/align-tracks/AlignTracks.live-editor/slices/AlignTracks.fix.slice.tres"
-documentation_references = PoolStringArray(  )
+documentation_references = PoolStringArray( "align" )
 documentation_resource = ExtResource( 1 )
 description = "Some chunks of our train tracks are misaligned, and the train can't pass. Find the faulty pieces and realign them."