Bump actions/upload-pages-artifact from 1 to 2 (#159)

Bumps [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) from 1 to 2.
- [Release notes](https://github.com/actions/upload-pages-artifact/releases)
- [Commits](actions/upload-pages-artifact@v1...v2)

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

.github/workflows/generate_site_and_deploy.yaml

@@ -61,7 +61,7 @@ jobs:
           --baseURL "${{ steps.pages.outputs.base_url }}/"
     - name: Upload artifact
       if: github.event.sender.login == 'pankona'
-      uses: actions/upload-pages-artifact@v1
+      uses: actions/upload-pages-artifact@v2
       with:
         path: ./public
   deploy: