call micropip installed of loading packages

pyscriptjs/examples/panel.html

@@ -13,6 +13,7 @@
     <py-env>
       - bokeh
       - numpy
+      - panel
     </py-env>
     <h1>Panel Example</h1>
     <div id="myplot"></div>
@@ -20,8 +21,6 @@
 import asyncio
 import micropip
 
-await micropip.install(['panel'])
-
 import panel as pn
 
 slider = pn.widgets.FloatSlider(start=0, end=10, name='Amplitude')