deps: bump actions/upload-pages-artifact from 1.0.8 to 2.0.0

Bumps [actions/upload-pages-artifact](https://github.com/actions/upload-pages-artifact) from 1.0.8 to 2.0.0.
- [Release notes](https://github.com/actions/upload-pages-artifact/releases)
- [Commits](actions/upload-pages-artifact@v1.0.8...v2.0.0)

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

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

.github/workflows/docs.yml

@@ -24,7 +24,7 @@ jobs:
         echo "<meta http-equiv=\"refresh\" content=\"0; url=libp2p\">" > target/doc/index.html
         cp -r target/doc/* ./host-docs
     - name: Upload documentation
-      uses: actions/upload-pages-artifact@v1.0.8
+      uses: actions/upload-pages-artifact@v2.0.0
       with:
         path: "host-docs/"