fix: Change goneovim image and text (#245)

in the showcase section

Author: akiyosi

images/showcase/goneovim.png

@@ -40,7 +40,7 @@ <h5>Nyancat in <a href="https://github.com/smolck/uivonim">Uivonim</a></h5>
       </li>
 
       <li>
-        <h5>Minimap and emojis in <a href="https://github.com/akiyosi/goneovim">Goneovim</a></h5>
+        <h5>Minimap and externalized window in <a href="https://github.com/akiyosi/goneovim">Goneovim</a></h5>
 	    <img src="/images/showcase/goneovim.png" alt="goneovim (courtesy of @akyosi)" width="80%"/>
       </li>