Move asphotheme.css to root dir

src/html/index.html

@@ -4,7 +4,7 @@
 		<meta charset="UTF-8">
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
 		<title>Asphodel Dice Roller</title>
-		<link rel="stylesheet" href="css/asphotheme.css">
+		<link rel="stylesheet" href="asphotheme.css">
 		<script src="https://code.jquery.com/jquery-3.5.1.min.js" type="text/javascript"></script>
 		<script src="bundle.js" type="text/javascript"></script>
 	</head>