Shares of LivePerson Inc. LPSN were rising 17% Friday after Starboard Value LP said it has nominated a slate of directors for election at the company’s 2023 annual meeting. Starboard disclosed its “involvement” with LivePerson in a February 2022 filing; Peter Feld, a Starboard managing member, said in a letter Friday that while Starboard tried to convince the board last year that leadership changes were needed, the board maintained that the company was positioned to improve under its existing management. At that point, Feld said Starboard agreed to back down on its request for management changes if LivePerson added three…