Fix docstring.

src/tempe/shapes.pyi

@@ -261,7 +261,7 @@ class Polygons(FillableGeometry[point_array]):
     def __iter__(self) -> tuple[point_array, int]: ...
 
 class PolyLines(ColoredGeometry[point_array]):
-    """Render multiple polygons.
+    """Render multiple polylines.
 
     Geometry should produce vertex arrays of the form [x0, y0, x1, y1, ...].
     """