updated gitignore
updated gitignore

FelixZhang00/calendar,Baremetrics/calendar,danieljacobarcher/calendar,KonishiLee/calendar,Baremetrics/calendar,nicholasleblanc/calendar,theodorejb/calendar,danieljacobarcher/calendar,FelixZhang00/calendar,nicholasleblanc/calendar,KonishiLee/calendar,attribution/calendar,Magicline/calendar,Magicline/calendar,attribution/calendar,theodorejb/calendar