Bump url-slug from 3.0.4 to 4.0.1 (#151)

Bumps [url-slug](https://github.com/stldo/url-slug) from 3.0.4 to 4.0.1.
- [Commits](stldo/url-slug@v3.0.4...v4.0.1)

---
updated-dependencies:
- dependency-name: url-slug
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Charlton Trezevant <7227500+chtzvt@users.noreply.github.com>

package.json

@@ -31,6 +31,6 @@
     "markdown-it": "^13.0.1",
     "require-dir": "^1.2.0",
     "svg-sprite": "^2.0.2",
-    "url-slug": "^3.0.4"
+    "url-slug": "^4.0.1"
   }
 }