fix: unpkg import in Getting Started codelab for blockly v11

[mark-friedman]

The basics

• I validated my changes

The details

Resolves

Fixes #2378

Proposed Changes

Change the unpkg import to be valid.

Reason for Changes

See #2378 for more info.

Test Coverage

Documentation

This PR updates the codelab documentation.

Additional Information

[BeksOmega]

Hey Mark! Thanks for the fix :D

Could you actually change it to match the usage we document on devsite?

<!-- Load Blockly core -->
<script src="https://unpkg.com/blockly/blockly_compressed.js"></script>
<!-- Load the default blocks -->
<script src="https://unpkg.com/blockly/blocks_compressed.js"></script>
<!-- Load a generator -->
<script src="https://unpkg.com/blockly/javascript_compressed.js"></script>
<!-- Load a message file -->
<script src="https://unpkg.com/blockly/msg/en.js"></script>

Also @cpcallen just in case this wasn't expected to change.

[mark-friedman]

Could you actually change it to match the usage we document on devsite? ...

Sure. I'll just point out that a few other examples also currently use "https://unpkg.com/blockly/blockly.min.js"

[mark-friedman]

@BeksOmega Do you want me to include the comments for those loads in the code and the codelab?

[BeksOmega]

@BeksOmega Do you want me to include the comments for those loads in the code and the codelab?

Nah leaving them out is fine!

[BeksOmega]

Thanks again for the fix Mark!