Update README.md

Author: xiaowuc2

README.md

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 # qxresearch
 qxresearch official website! qxresearch.github.io
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+<div class="badge-base LI-profile-badge" data-locale="en_US" data-size="medium" data-theme="dark" data-type="VERTICAL" data-vanity="xiaowuc2" data-version="v1"><a class="badge-base__link LI-simple-link" href="https://in.linkedin.com/in/xiaowuc2?trk=profile-badge">Rohit Prasan Mandal</a></div>
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