Add link to user css themes in config menu

app/templates/index.html

@@ -175,7 +175,10 @@
 					<input type="text" name="url" id="config-url" value="{{ config.url }}">
 				</div>
 				<div class="config-div config-div-custom-css">
-					<label for="config-style">{{ translation['config-css'] }}:</label>
+					<a id="css-link"
+						href="https://github.com/benbusby/whoogle-search/wiki/User-Contributed-CSS-Themes">
+						{{ translation['config-css'] }}:
+					</a>
 					<textarea
 					name="style"
 					id="config-style"