Fix typo in changelog
Fix typo in changelog

MarcelGerber/acorn,Rich-Harris/acorn,ternjs/acorn,ternjs/acorn,Rich-Harris/acorn,mathiasbynens/acorn,mathiasbynens/acorn,marijnh/acorn,ajaxorg/acorn,TimothyGu/acorn,mysticatea/acorn,Rich-Harris/acorn,TimothyGu/acorn,ajaxorg/acorn,mysticatea/acorn,mysticatea/acorn,marijnh/acorn,ternjs/acorn,marijnh/acorn,MarcelGerber/acorn,mathiasbynens/acorn,ajaxorg/acorn,TimothyGu/acorn,MarcelGerber/acorn