fixed css file being used on ionic them tests

Author: BenOsodrac

core/src/themes/ionic/test/colors/index.html

@@ -7,7 +7,7 @@
       name="viewport"
       content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"
     />
-    <link href="../../../../../css/ionic.bundle.css" rel="stylesheet" />
+    <link href="../../../../../css/ionic/bundle.ionic.css" rel="stylesheet" />
     <link href="../../../../../scripts/testing/styles.css" rel="stylesheet" />
     <script src="../../../../../scripts/testing/scripts.js"></script>
     <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>