docs(release-scm): fix setup-cz link

[Lee-W]

Description

The setup-cz link in docs/tutorials/release-scm.md was missing the https:// scheme (it read github.com/commitizen-tools/setup-cz), so it rendered as a broken/relative link instead of a working hyperlink. This adds the full scheme.

Checklist

• I have read the contributing guidelines

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

Code Changes

Not applicable — documentation-only change, no code modified.

• Add test cases to all the changes you introduce
• Run uv run poe all locally to ensure this change passes linter check and tests
• Manually test the changes:
  • Verify the feature/bug fix works as expected in real-world scenarios
  • Test edge cases and error conditions
  • Ensure backward compatibility is maintained
  • Document any manual testing steps performed
• Update the documentation for the changes

Documentation Changes

• Run uv run poe doc locally to ensure the documentation pages renders correctly
• Check and fix any broken links (internal or external)

Expected Behavior

In docs/tutorials/release-scm.md, the setup-cz link inside the "Wrap this in a CI job…" tip block renders as a clickable hyperlink pointing to https://github.com/commitizen-tools/setup-cz.
In docs/tutorials/release-scm.md, the setup-cz link inside the "Wrap this in a CI job…" tip block renders as a clickable hyperlink pointing to https://github.com/commitizen-tools/setup-cz.

Steps to Test This Pull Request

1. Run uv run poe doc to build the docs site locally
2. Open the tutorials/release-scm.md page and find the tip block just above "Why Can't I Bump with SCM?"
3. Confirm the setup-cz link is clickable and resolves to https://github.com/commitizen-tools/setup-cz

Additional Context

[github-actions]

🔍 Commitizen bump preview

No commits in this PR are eligible for a version bump.