build(deps): bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/publish.yml

@@ -27,7 +27,7 @@ jobs:
           echo -e "---\nlayout: default\ntitle: Usage\n---\n" > ./artifact/site/usage/index.md
           echo "$(sed -r s"/(\{%[^%]+%\})/{% raw %}\1{% endraw %}/g" ./docs/usage.md)" >> ./artifact/site/usage/index.md
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: artifact
           path: ./artifact
@@ -42,7 +42,7 @@ jobs:
         run: |
           docker run --rm -v $(pwd):/data phpdoc/phpdoc:3 -d ./src -t ./artifact/site/phpdoc
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: artifact
           path: ./artifact