Update logo url in readme.
<div align="center">
- <a href="https://metacall.io" target="_blank"><img src="/deploy/images/logo.png" alt="M E T A C A L L" style="max-width:100%;" width="32" height="32">
+ <a href="https://metacall.io" target="_blank"><img src="https://raw.githubusercontent.com/metacall/core/develop/deploy/images/logo.png" alt="M E T A C A L L" style="max-width:100%;" width="32" height="32">
<p><b>M E T A C A L L</b></p></a>
<p>A library for providing inter-language foreign function interface calls</p>
</div>
