Update plot_schedules.ipynb

[sachinsavale2007]

This will fix below error IndexError: index 1100 is out of bounds for axis 0 with size 1100

occurred at below line L[int(i + c * period)] = 1.0 / (1.0 + np.exp(- (v * 12. - 6.)))

when below parameters are use frange_cycle_linear(start=0.0, stop=1.0, n_epoch=1100, n_cycle=10, ratio=0.8)