fix(script): remove highlights template from release notes

[R44VC0RP]

Summary

• Removes the highlights template that was automatically prepended to release notes
• Minor whitespace cleanup in the template comment

[github-actions]

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[github-actions]

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No duplicate PRs found

[blacksmith-sh]

Found 1 test failure on Blacksmith runners:

Failure

Test	View Logs
e2e/file-tree.spec.ts/file tree can expand folders and open a file	View Logs