[keps] PSAT, LIGHTSAIL-1, and BRICSAT-P Included in This Weeks KEPs

This week's orb15155.2l.amsat file has PSAT, LIGHTSAIL-1, and BRICSAT-P included.

The KEPs use the correct satellite name and NORAD ID #. The checksum is correct for all these changes.

Ray Hoad WA5QGD