Remove beta release from changelog

[jordanjones243]

Alaska Airlines Pull Request

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Resolves: # (issue, if applicable)

Summary:

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Type of change:

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• [ ] New capability
• [ ] Revision of an existing capability
• [ ] Infrastructure change (automation, etc.)
• [x] Other (please elaborate)

Checklist:

• [x] My update follows the CONTRIBUTING guidelines of this project
• [x] I have performed a self-review of my own update

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Summary by Sourcery

Clean up the changelog by removing the beta release entry and enhance the demo HTML file by eliminating a duplicate stylesheet link.

Enhancements:

• Remove duplicate stylesheet link from the demo HTML file to improve code clarity.

Chores:

• Remove beta release entry from the changelog to clean up the document.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request removes a beta release entry from the changelog and removes a duplicate CSS import in the demo HTML file. It's a minor cleanup that doesn't introduce any new features or breaking changes.

File-Level Changes

Change	Details	Files
Removal of beta release entry from changelog	Deleted the entire section for version 3.0.0-beta.7 Removed information about performance improvements and breaking changes	CHANGELOG.md
Removal of duplicate CSS import in demo HTML	Deleted a duplicate link tag for CSSCustomProperties.css	demo/index.html

Sequence Diagram

No sequence diagram generated.

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