chore(deps): bump nunjucks in /tests/integration/eleventy-site (#5649)

Bumps [nunjucks](https://github.com/mozilla/nunjucks) from 3.2.3 to 3.2.4.
- [Release notes](https://github.com/mozilla/nunjucks/releases)
- [Changelog](https://github.com/mozilla/nunjucks/blob/master/CHANGELOG.md)
- [Commits](mozilla/nunjucks@v3.2.3...v3.2.4)

---
updated-dependencies:
- dependency-name: nunjucks
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]