⬆️ Bump nwtgck/actions-netlify from 1.1 to 3.0 (#256)

Bumps [nwtgck/actions-netlify](https://github.com/nwtgck/actions-netlify) from 1.1 to 3.0.
- [Release notes](https://github.com/nwtgck/actions-netlify/releases)
- [Changelog](https://github.com/nwtgck/actions-netlify/blob/develop/CHANGELOG.md)
- [Commits](nwtgck/actions-netlify@v1.1...v3.0)

---
updated-dependencies:
- dependency-name: nwtgck/actions-netlify
  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/ci.yml

@@ -50,7 +50,7 @@ jobs:
           mkdir -p _build/html/assets/data
           cp -a lectures/_data/. _build/html/assets/data/
       - name: Preview Deploy to Netlify
-        uses: nwtgck/actions-netlify@v1.1
+        uses: nwtgck/actions-netlify@v3.0
         with:
           publish-dir: '_build/html/'
           production-branch: master