docs(changelog): correct PR reference for DirectUrl typo fix in 26.2 (#1167 → #1169)

[r266-tech]

The 26.2 changelog entry currently lists:

* Document our property-based test suite in (:pull:`1167`)
* Fix a ``DirectUrl`` typo in (:pull:`1167`)

The second bullet's PR reference is wrong:

• docs(dev): document property-based test suite #1167 is docs(dev): document property-based test suite (already correctly attributed on the line above; touches docs/development/getting-started.rst).
• The actual DirectUrl typo fix (DirectUrlalidationError → DirectUrlValidationError in docs/direct_url.rst) landed in Fix typo in DirectUrl documentation #1169 by @sbidoul, merged the same afternoon.

Single-character fix on CHANGELOG.rst:24.

Note on convention: per @henryiii's redirect on #1173, changelog updates are normally batched into the release PR (#1161 here). This is a post-release errata correction in an already-published 26.2 section, so a release-PR suggestion path no longer exists. Happy to close this and wait for the next release-prep window if you'd prefer to fold it into the next batch.