Bump python-slugify from 8.0.3 to 8.0.4 (#581)

Bumps [python-slugify](https://github.com/un33k/python-slugify) from 8.0.3 to 8.0.4.
- [Changelog](https://github.com/un33k/python-slugify/blob/master/CHANGELOG.md)
- [Commits](un33k/python-slugify@v8.0.3...v8.0.4)

---
updated-dependencies:
- dependency-name: python-slugify
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -117,7 +117,7 @@ python-dateutil==2.8.2
     #   render-engine (pyproject.toml)
 python-frontmatter==1.1.0
     # via render-engine (pyproject.toml)
-python-slugify==8.0.3
+python-slugify==8.0.4
     # via render-engine (pyproject.toml)
 pyyaml==6.0.1
     # via