replace unpkg with jsdeliver in quick start instructions

[brothhammer]

Brief Description

The unpkg tool is no longer working as expected so we are replacing it with jsdelivr

JIRA Link

https://rocketcom.atlassian.net/browse/AP-400?linkSource=email

Related Issue

General Notes

I created an "astro-playground" on my personal git hub. For some reason I could not push to a new repository created under the Rocket account.

https://github.com/brothhammer/astro-playground

If you pull that repo you can run with the "Liver Server" plugin for VS code by right clicking in the file and selecting run with Live Server.

After we merge this we need to properly deploy StoryBook. The instructions for that can be found in Confluence here
https://rocketcom.atlassian.net/wiki/spaces/AS11/pages/3740565534/Astro+Deployment+Instructions

Motivation and Context

We do not want customers getting frustrated trying to follow the Quick Start instructions.

Issues and Limitations

Types of changes

• Non working instructions for quick start

Checklist

• This PR adds or removes a Storybook story.
• I have added tests to cover my changes.
• Regressions are passing and/or failures are documented
• Changes have been checked in evergreen browsers

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[FMorrison87]

You'll need to change the web components README as well, as that references unpkg: https://github.com/RocketCommunicationsInc/astro/blob/main/packages/web-components/README.md

[FMorrison87]

Looks good 🙌