Update README link to HTTPS
Update README link to HTTPS

Fixes #249
Honko/honko-damagecalc,Zarel/honko-damagecalc,Honko/honko-damagecalc,MagiaSN/honko-damagecalc,MagiaSN/honko-damagecalc,Zarel/honko-damagecalc,AustinXII/honko-damagecalc,AustinXII/honko-damagecalc,Honko/honko-damagecalc,Zarel/honko-damagecalc,MagiaSN/honko-damagecalc