Kforce reports record second quarter 2021 revenues of $403.6 million, up 17.7% year-over-year; technology revenues grew 9.4% sequentially on a billing day basis and 21.5% year-over-year; eps of $1.00, an increase of 113% year-over-year; kforce's board of directors increased its quarterly dividend for the second time in 2021 to $0.26 per share, a 13% increase