Fix reference to twbs/examples/icons-font + fine-tune index.html SB location target#38310

XhmikosR merged 6 commits intomaintwbs/bootstrap:mainfrom

main-jd-fix-url-to-index.html-in-starters-examplestwbs/bootstrap:main-jd-fix-url-to-index.html-in-starters-examplesCopy head branch name to clipboard