Tyrannical catwalk queen Tyra Banks is trying to change her spots, according to sources — who claim motherhood and a break from the limelight have mellowed the one-time “monster.” Tyra, 50, became one of TV’s most hated women after reigning over toxic environments at America’s Next Top Model and Dancing with the Stars. But a source insisted she’s “changed” a year after parting ways with DWTS and becoming a full-time mom to eight-year-old York, the son she shares with ex-beau Erik Asla. Said a television insider: “During her TV work, Tyra sometimes looked like she relished delivering bad news o…