Fix Dancer logo in README

Author: cromedome

README.md

@@ -1,7 +1,5 @@
 <p align="center">
-  <a href="https://perldancer.org/">
-    <img src="https://crome-plated.com/images/dancer-logo.png" alt="Perl Dancer logo">
-  </a>
+  <a href="https://perldancer.org/">![Perl Dancer logo](https://crome-plated.com/images/dancer-logo.png)</a>
 </p>
 
 <p align="center">