docs(pages/technical-explanation): update code highlighting

[amorriscode]

• Docs

Description

While reading the technical explanation docs, it seemed like the code highlighting in the Browser Framework section was off. I believe the inside of the form should be highlighted as well as the FadeIn.

This PR updates the code highlighting to highlight the features discussed in the section.

[remix-cla-bot]

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- The Remix team

[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳

[MichaelDeBoey]

@amorriscode docs changes go to main. Can you please rebase your branch onto main & set base branch of the PR to main as well?

[amorriscode]

@MichaelDeBoey done! Thanks for the quick response and fix of my mistake. 😳