Incorrect anchor link for "leaseholder" in architecture terms section

[EdanStasiuk]

Summary

In the CockroachDB Architecture Terms section of the docs, the "leaseholder" reference listed under the Raft leader entry contains an incorrect hyperlink anchor. The link currently points to #architecture-raft-leader instead of the correct #leaseholder anchor.

Steps to Reproduce

1. Navigate to the CockroachDB Architecture Terms glossary page in the docs.
2. Locate the Raft leader entry.
3. Click the leaseholder hyperlink within that entry.

Expected Behavior

Clicking the "leaseholder" link should navigate to the #leaseholder section of the page.

Actual Behavior

The link navigates to the #architecture-raft-leader anchor instead. Inspecting the element confirms the incorrect href:

<a href="#architecture-raft-leader">leaseholder</a>

Proposed Fix

<a href="#leaseholder">leaseholder</a>

Jira issue: DOC-16978