Wrong energy range in isgri lightcurves

For instance at:

https://www.astro.unige.ch/mmoda/gallery/data-products/crab-isgri-light-curve-5

The energy range indicated in the page is 3 -20 keV, which is the one for JEM-X, while the one for ISGRI is correctly indicated in the label of the plot.

This needs to be corrected.