The ornamental design for candy, as shown and described.
1. Candy
1.1: Front perspective
1.2: Front elevation
1.3: Back elevation
1.4: Right-side elevation
1.5: Left-side elevation
1.6: Top plan
1.7: Bottom plan
The dashed broken lines depict portions of the candy that form no part of the claimed design. The dot-dashed broken lines represent boundaries of the claimed candy and form no part of the claimed design.