Bump actions/upload-artifact from 1 to 3 (#710)

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

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

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

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

Author: dependabot[bot]

.github/workflows/docsite.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Build
         run: mkdocs build -s
       - name: Upload artifact
-        uses: actions/upload-artifact@v1
+        uses: actions/upload-artifact@v3
         with:
           name: site
           path: site