Update CONTRIBUTING.md

Author: UNOFFICIALbgd

CONTRIBUTING.md

@@ -1,5 +1,5 @@
 <h1 align="center" style="margin-top: 1em; margin-bottom: 2em;">
-  <p><a href="https://ethereum.org"><img alt="ethereum logo" src="./eth-transparent.png" alt="ethereum.org" width="125"></a></p>
+  <p><a href="https://ethereum.org"><img alt="ethereum logo" src="./public/images/assets/eth-transparent.png" alt="ethereum.org" width="125"></a></p>
   <p>👋 Contributing to ethereum.org</p>
 </h1>