Fix banner format

Author: ai

README.md

@@ -15,8 +15,12 @@ capable of parsing any input. It is useful for:
 [Browserhacks]:      http://browserhacks.com/
 [PostCSS]:           https://github.com/postcss/postcss
 
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 <img src="https://cdn.evilmartians.com/badges/logo-no-label.svg" alt="" width="22" height="16" />  Made at <b><a href="https://evilmartians.com/devtools?utm_source=postcss-safe-parser&utm_campaign=devtools-button&utm_medium=github">Evil Martians</a></b>, product consulting for <b>developer tools</b>.
 
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 ## Usage