expecting no error as updatefn is not returning one (#50)

Co-authored-by: Andreas Amstutz <tullo@users.noreply.github.com>

Author: tullo

internal/trainer/adapters/hour_repository_test.go

@@ -216,7 +216,7 @@ func testUpdateHour_rollback(t *testing.T, repository hour.Repository) {
 		require.NoError(t, h.MakeAvailable())
 		return h, nil
 	})
-	require.Error(t, err)
+	require.NoError(t, err)
 
 	err = repository.UpdateHour(ctx, hourTime, func(h *hour.Hour) (*hour.Hour, error) {
 		assert.True(t, h.IsAvailable())