Update browseimage.py
Update browseimage.py

removed https from Mapbox url causing error in some urrllib

RCMRD/FloodMapsWorkshop,RCMRD/FloodMapsWorkshop,RCMRD/FloodMapsWorkshop,vightel/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,vightel/FloodMapsWorkshop,RCMRD/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,vightel/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,vightel/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,pmav99/FloodMapsWorkshop,RCMRD/FloodMapsWorkshop,RCMRD/FloodMapsWorkshop