index.html: Prefer HTTPS for assets
index.html: Prefer HTTPS for assets

All assests are hosted on servers configured for HTTPS, so this is
absolutely preferable in this day and age.

Signed-off-by: Alan Orth <c25dd0841d5fa94899de8e3e4e0aaeefb868a1ba@gmail.com>

rlugojr/milligram,rlugojr/milligram,jackmcpickle/milligram,milligram/milligram,thompsonemerson/milligram,thompsonemerson/milligram,milligram/milligram,jackmcpickle/milligram