JS docs: fix caps of "CSS" acronym
JS docs: fix caps of "CSS" acronym

BS3 commit 3a96ff9a0a9c1eac4d19fb708e1901cc81d2d9df

mozillo/todc-bootstrap,todc/todc-bootstrap,todc/todc-bootstrap,aaroncnhk/todc-bootstrap,2947721120/todc-bootstrap,ztx1491/todc-bootstrap,up2vs/todc-bootstrap,todc/todc-bootstrap,2947721120/googlebt4