fixed fuzz value for material_right to match reference image #1728
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In chapter 11.5. Modeling a Hollow Glass Sphere of Ray Tracing in One Weekend, there is a typo in the code.
Listing 79 highlights the changes to the dielectric material. Not highlighted, is the fuzz value of for the metal material, which has been set to
0.0. This seems to be a typo considering the line is not highlighted, and, more importantly, the reference image 18 still shows a rough metal material, indicative of a fuzz value greater than0.0.fixes #1673