Add handshake emoji to donations banner to make it more visible.

docs/_templates/layout.html

@@ -4,7 +4,7 @@
 {{ super() }}
 {% if pagename != "src/donating" %}
 <div style="width: 100%; height: 3em; vertical-align: middle; text-align: center; font-weight: bold; background-color: lightgray; border: solid red 1px">
-    <p style="font-size: 110%">Like the tool? Help making it better! <a href="{{ pathto("src/donating") }}">Your donation helps!</a></p>
+    <p style="font-size: 110%">🤝 Like the tool? Help making it better! <a href="{{ pathto("src/donating") }}">Your donation helps!</a> 🤝</p>
 </div>
 {% endif %}
 {% endblock %}