variables.less: Fix typo in comment for @caret-width-base
variables.less: Fix typo in comment for @caret-width-base

BS3 commits: 98b9ff6b7ad3f3d37670f748363736fe4e91fafd

2947721120/todc-bootstrap,todc/todc-bootstrap,todc/todc-bootstrap,todc/todc-bootstrap