Crediting Remix Icon as well.

Author: joeraz

AUTHORS.md

@@ -36,6 +36,7 @@ Enhancements
 
 * [ghostofiht](https://github.com/ghostofiht) - Contributed a new logo design.
 * [Trueno font](https://fontlibrary.org/en/font/trueno) under the [OFL](https://en.wikipedia.org/wiki/SIL_Open_Font_License) by [Julieta Ulanovsky](http://www.zkysky.com.ar/) - used in the logo.
+* [Remix Icon](https://remixicon.com/) - used for many icons throughout the app.
 
 Translations
 ============

html-src/credits.html

@@ -25,6 +25,7 @@ <h2>Enhancements</h2>
 <ul>
 <li><a href="https://github.com/ghostofiht">ghostofiht</a> - Contributed a new logo design.</li>
 <li><a href="https://fontlibrary.org/en/font/trueno">Trueno font</a> under the <a href="https://en.wikipedia.org/wiki/SIL_Open_Font_License">OFL</a> by <a href="http://www.zkysky.com.ar/">Julieta Ulanovsky</a> - used in the logo.</li>
+<li><a href="https://remixicon.com/">Remix Icon</a> - used for many icons throughout the app.</li>
 </ul>
 <h2>Translations</h2>
 <ul>