BUG: update the edge modes in the example to match the current naming convention

doc/examples/plot_edge_modes.py

@@ -19,7 +19,7 @@ img[:2, :2] += 1
 img[:1, :1] += 2
 img[8, 8] = 4
 
-modes = ['constant', 'nearest', 'wrap', 'reflect', 'mirror']
+modes = ['constant', 'edge', 'wrap', 'reflect', 'symmetric']
 fig, axes = plt.subplots(1, 5, figsize=(15, 5))
 for n, mode in enumerate(modes):
     img_extended = extend_image(img, pad=img.shape[0], mode=mode)