fix: remove zensical.toml references to deleted stub pages

[joamatab]

Summary

• Remove zensical.toml nav entries pointing to deleted stub .md files

Follows up on the stub page removal in fix/empty-stub-pages.

Test plan

• Verify docs build succeeds

Summary by Sourcery

Clean up documentation navigation by removing an entry for a deleted tutorial stub page from zensical.toml.

Bug Fixes:

• Remove navigation entry pointing to a deleted tutorial markdown file to prevent broken docs links.

Documentation:

• Update docs navigation configuration to exclude the removed tutorial stub page.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Removes a stale navigation entry from zensical.toml that referenced a deleted tutorial stub markdown file, keeping the docs navigation in sync with existing pages.

File-Level Changes

Change	Details	Files
Clean up docs navigation by removing a nav item that points to a deleted tutorial page.	Delete the Tutorial->Overview entry that referenced tutorial.md from the nav array Leave the rest of the Tutorial navigation entries (Technology, Intro, Rc Filter Analysis) unchanged	zensical.toml

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[gemini-code-assist]

Code Review

This pull request updates the zensical.toml configuration file by removing the 'Overview' entry from the 'Tutorial' navigation section. As there are no review comments provided, I have no feedback to offer regarding the changes.