It’s a feather in her cap. The amorous spotlight is about to shine on Penelope Featherington in “Bridgerton” season 3, Nicola Coughlan announced Sunday night during Netflix’s FYSEE Space’s opening night ATAS panel, the Daily News learned. Coughlan, 35, confirmed that #Polin — that is, the burgeoning love story between her character Penelope, and pal Colin Bridgerton (Luke Newton) — will take center stage next season. The series, from Emmy-nominated executive producer Shonda Rhimes and based on Julia Quinn’s best-selling novels, debuted on the streamer in late 2020 to near-immediate adoration a…