Fix the list of catchment areas to be consistent with the map in the 'lumped_daily' help page

Due the alphabetical order between H2 and H3 codes, in the help page, the list of catchemnts areas is not consitent with the map:

| F439000101 | F | the Seine at Plaines-Saint-Lange |
| H010002001 | G | the Aube at Bar-sur-Aube         |
| H120101001 | H | the Loing at Épisy               |

should be:

| F439000101 | F | the Loing at Épisy               |
| H010002001 | G | the Seine at Plaines-Saint-Lange |
| H120101001 | H | the Aube at Bar-sur-Aube         |