fix: skip optimizer run on non-JS script tags

[benmccann]

Description

Skip <script type="application/ld+json"> and other non-JS script types

Fixes #4564

Additional context

This is commonly included on webpages for SEO purposes:
https://developers.google.com/search/docs/advanced/structured-data/intro-structured-data

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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