templates.flights.list_json: fix date output
templates.flights.list_json: fix date output

skylines-project/skylines,kerel-fs/skylines,RBE-Avionik/skylines,Harry-R/skylines,Harry-R/skylines,Turbo87/skylines,snip/skylines,dkm/skylines,TobiasLohner/SkyLines,dkm/skylines,skylines-project/skylines,dkm/skylines,shadowoneau/skylines,shadowoneau/skylines,shadowoneau/skylines,Turbo87/skylines,snip/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,Harry-R/skylines,kerel-fs/skylines,Turbo87/skylines,TobiasLohner/SkyLines,skylines-project/skylines,Turbo87/skylines,RBE-Avionik/skylines,TobiasLohner/SkyLines,skylines-project/skylines,shadowoneau/skylines,Harry-R/skylines,dkm/skylines,kerel-fs/skylines,snip/skylines