Changed last-child to first-child
As noted by @jerem the first child will actually be the last shown
Docs: add missing example code code for `kbd` after #13351.
Merge pull request #14047 from twbs/kbd

Docs: add missing example code code for `kbd` after #13351.
Merge pull request #13464 from nickcolley/#13325-navbar-right-first

Changed last-child to first-child to fix #13325