docs: use better supported heart emoji

Author: craftablescience

docs/index.html

@@ -803,7 +803,7 @@ <h2>Special Thanks</h2>
 				</ul>
 			</section>
 			<footer>
-				Written with <span class="flag-trans">🩵</span> and published under <a href="https://opensource.org/license/MIT" target="_blank" rel="noreferrer">The MIT License</a>.
+				Written with <span class="flag-trans">♥️</span> and published under <a href="https://opensource.org/license/MIT" target="_blank" rel="noreferrer">The MIT License</a>.
 			</footer>
 		</main>
 	</body>