Update docs changelog (for PR #58552) (#58596)

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CHANGELOG.md

@@ -1,5 +1,15 @@
 # Docs changelog
 
+**24 November 2025**
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+We've added a new tutorial on burning down technical debt in a project: 
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+[Using GitHub Copilot to reduce technical debt](https://docs.github.com/en/copilot/tutorials/reduce-technical-debt)
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+The addition of this tutorial was prompted by a presentation by Brittany Ellich at this year's GitHub Universe conference: [Tackling your tech debt with Copilot coding agent](https://www.youtube.com/watch?v=LafpndhNC_E), and is based on a GitHub community post by Akash Sharma: [Stop Letting Technical Debt Slow You Down](https://github.com/orgs/community/discussions/178975).
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+<hr>
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 **13 November 2025**
 
 We've published a new tutorial on [using custom instructions for Copilot code review](https://docs.github.com/copilot/tutorials/use-custom-instructions). In this tutorial you'll learn how to write effective custom instructions that help Copilot provide more relevant and actionable code reviews.