Fix: Remove inexistent link from the documentation.

[jorgefilipecosta]

The section /docs/how-to-guides/block-tutorial/introducing-attributes-and-editable-fields.md was removed, and this tutorial is not available anymore. This PR returns a link to the section that is invalid and does not exist.

[github-actions]

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[github-actions]

Flaky tests detected in 5d66232.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/9548035372
📝 Reported issues:

• [Flaky Test] Navigates from items list to preview via TAB, and vice versa #62434 in /test/e2e/specs/site-editor/dataviews-list-layout-keyboard.spec.js

[ellatrix]

What happened to it?

[jorgefilipecosta]

That section was removed here #57120 but we missed the removal of this link. The idea according to that PR was that Building your first block tutorial would be a good replacement for that section. But in this context of a block API reference linking to the build your first block tutorial is not very useful.

[ellatrix]

Commented on that PR, it a bit weird to remove these pages and break links on the web.