Make title underline longerrrr

This is necessary for release.

README.rst

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 |Python3| |GithubCommits| |BlackFormatBadge|
 
 **English** `简体中文`_ `繁體中文`_ `Français`_ `فارسی`_ `Español`_ `日本語`_ `Italiano`_ `Русский`_
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 Pygame_ is a free and open-source cross-platform library
 for the development of multimedia applications like video games using Python.