Fix mismatched constant name in `static func ==` doc
Fix mismatched constant name in `static func ==` doc

- I've found a mismatched constant name in `static func ==` example.
- Given the context, it should be `numberToMatch`, not `numberToFind`.

ahoppen/swift,roambotics/swift,atrick/swift,JGiola/swift,atrick/swift,apple/swift,JGiola/swift,JGiola/swift,glessard/swift,benlangmuir/swift,apple/swift,glessard/swift,apple/swift,atrick/swift,glessard/swift,atrick/swift,ahoppen/swift,glessard/swift,JGiola/swift,benlangmuir/swift,apple/swift,benlangmuir/swift,roambotics/swift,glessard/swift,benlangmuir/swift,benlangmuir/swift,roambotics/swift,ahoppen/swift,apple/swift,benlangmuir/swift,atrick/swift,roambotics/swift,JGiola/swift,atrick/swift,ahoppen/swift,roambotics/swift,ahoppen/swift,JGiola/swift,apple/swift,ahoppen/swift,glessard/swift,roambotics/swift