Fix ending quote in Using tilemaps (#3563)

tutorials/2d/using_tilemaps.rst

@@ -8,7 +8,7 @@ Introduction
 
 A tilemap is a grid of tiles used to create a game's layout. There are several
 benefits to using :ref:`TileMap <class_TileMap>` nodes to design your levels.
-First, they make it possible to draw the layout by "painting' the tiles onto a
+First, they make it possible to draw the layout by "painting" the tiles onto a
 grid, which is much faster than placing individual :ref:`Sprite <class_Sprite>`
 nodes one by one. Second, they allow for much larger levels because they are
 optimized for drawing large numbers of tiles. Finally, you can add collision,