Bump nwtgck/actions-netlify from 3 to 4

Bumps [nwtgck/actions-netlify](https://github.com/nwtgck/actions-netlify) from 3 to 4.
- [Release notes](https://github.com/nwtgck/actions-netlify/releases)
- [Changelog](https://github.com/nwtgck/actions-netlify/blob/develop/CHANGELOG.md)
- [Commits](nwtgck/actions-netlify@v3...v4)

---
updated-dependencies:
- dependency-name: nwtgck/actions-netlify
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -44,7 +44,7 @@ jobs:
         run: dart test
       - name: Deploy to netlify (Branch)
         if: ${{ github.event_name == 'push' }}
-        uses: nwtgck/actions-netlify@v3
+        uses: nwtgck/actions-netlify@v4
         with:
           production-branch: latest-release
           publish-dir: docs/build/jaspr
@@ -57,7 +57,7 @@ jobs:
           NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
       - name: Deploy to netlify (Pull Request)
         if: ${{ github.event_name == 'pull_request' }}
-        uses: nwtgck/actions-netlify@v3
+        uses: nwtgck/actions-netlify@v4
         with:
           production-branch: latest-release
           publish-dir: docs/build/jaspr