added 2nd song for tabata.

frontend/initial-data.ts

@@ -307,7 +307,7 @@ const data: { trainings: ITraining[]; polls: any } = {
           title: "Tabata",
           repetitions: 1,
           rest: 60,
-          video: "/media/tabata.mp4",
+          video: "/media/tabata2.mp4",
           format: {
             id: "format0",
             name: "Sequence",