Use the "Image Size" tool (Image> Image Size) to apply the following properties:

Width: 110 percent
Height: 110 percent
Resample Image: Bicubic

Click OK.

Here is a cropped area from a normal bicubic interpolation. As you can see, there is very little difference in the two methods. When magnified, the stair interpolation method seems to do a slightly better, almost unnoticeable, job in high contrast areas.