Planet Hunters TESS. V. A Planetary System Around a Binary Star, Including a Mini-Neptune in the Habitable Zone by Eisner, NL, Grunblatt, SK, Barragán, O, Faridani, TH, Lintott, C, Aigrain, S, Johnston, C, Mason, IR, Stassun, KG, Bedell, M, Boyle, AW, Ciardi, DR, Clark, CA, Hebrard, G, Hogg, DW, Howell, SB, Klein, B, Llama, J, Winn, JN, Zhao, LL, Murphy, JMA, Beard, C, Brinkman, CL, Chontos, A, Alhassan, S, Amratlal, DJ, Antonel, LI, Bentzen, SLS, Bosch, MKD, Bundy, D, Chitsiga, I, Delaunay, JF, Doisy, X, Ferstenou, R, Fynø, M, Geary, JM, Haynaly, G, Hermes, P, Huten, M, Lee, S, Metcalfe, P, Pennell, GJ, Puszkarska, J, Schäfer, T, Stiller, L, Tanner, C, Tarr, A, Wilkinson, A