docs: add link to lite lab

Author: datakurre

_templates/lite-demo.html

@@ -15,8 +15,9 @@ <h2>DEMO</h2>
   >
     <input
       type="submit"
+      title="RobotKernel in the la[te]st Jupyter UI"
       title="JupyterLab UI"
-      value="lab"
+      value="JupyterLab"
       class="launch-demo"
     />
     <input name="path" type="hidden" value="example.ipynb" />
@@ -136,8 +137,6 @@ <h2>DEMO</h2>
   .launch-demo:hover,
   .launch-demo:active,
   .launch-demo:focus {
-    background-color: var(--pg-brand-color0);
-    color: var(--pg-layout-color0);
-    text-decoration: none;
+    text-decoration: underline;
   }
 </style>