Corrected spelling of designer's first name

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Many sources have "Steven", but the correct spelling is "Stephen". I cited the brochure published by Sport Flight Engineering, Inc. in 1983 which has his picture, name, and signature inside the front cover. The brochure has no ISBN, but I have attached a scan of page 1.

File:Sky pup broch pg 1.jpg
Page 1 of 1983 Sky Pup brochure