docs: update readme to use latest and switch unpkg to jsdelivr (ionic-team#1084)

* docs: switch unpkg to jsdelivr

* docs: fix script tag

* Update readme.md

* Update package.json

---------

Co-authored-by: Liam DeBeasi <[email protected]>
Co-authored-by: mo7amd <[email protected]>

Author: 3 people

readme.md

@@ -26,7 +26,8 @@ Also note that only visible icons are loaded, and icons which are "below the fol
 If you're using [Ionic Framework](https://ionicframework.com/), Ionicons is packaged by default, so no installation is necessary. Want to use Ionicons without Ionic Framework? Place the following `<script>` near the end of your page, right before the closing </body> tag, to enable them.
 
 ```html
-<script src="https://unpkg.com/ionicons@latest/dist/ionicons.js"></script>
+<script type="module" src="https://cdn.jsdelivr.net/npm/ionicons@latest/dist/ionicons/ionicons.esm.js"></script>
+<script nomodule src="https://cdn.jsdelivr.net/npm/ionicons@latest/dist/ionicons/ionicons.js"></script>
 ```
 
 ### Basic usage