[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Tests/test_imagedraw.py

@@ -744,7 +744,7 @@ def test_rectangle_I16(bbox):
     draw = ImageDraw.Draw(im)
 
     # Act
-    draw.rectangle(bbox, outline=0xffff)
+    draw.rectangle(bbox, outline=0xFFFF)
 
     # Assert
     assert_image_equal_tofile(im.convert("I"), "Tests/images/imagedraw_rectangle_I.png")