ci: bump actions/upload-pages-artifact from 1 to 3

Bumps [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) from 1 to 3.
- [Release notes](https://github.com/actions/upload-pages-artifact/releases)
- [Commits](actions/upload-pages-artifact@v1...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/docs.yaml

@@ -30,7 +30,7 @@ jobs:
  npm install --prefix site/
  npm run build --prefix site/
  - name: Upload artifact
- uses: actions/upload-pages-artifact@v1
+ uses: actions/upload-pages-artifact@v3
  with:
  path: "./site/build"
  - name: Deploy to GitHub Pages