Update demo form on the preview page

[alyblenkin]

Problem: The demo form for PhilSA Disaster Incidence report isn't working.
Solution: We want to update that form with one from the Red Cross, so that people can see a working form.

Copy

Distribution Site Assessment
Public form used by the International Red Cross and Red Crescent Movement to distribute cash-aid.

[alyblenkin]

I found this image: