Bump toolmantim/release-drafter from 5.25.0 to 6.0.0 (#801)

Bumps [toolmantim/release-drafter](https://github.com/toolmantim/release-drafter) from 5.25.0 to 6.0.0.
- [Release notes](https://github.com/toolmantim/release-drafter/releases)
- [Commits](release-drafter/release-drafter@v5.25.0...v6.0.0)

---
updated-dependencies:
- dependency-name: toolmantim/release-drafter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/release-notes.yml

@@ -10,6 +10,6 @@ jobs:
     if: github.repository == 'larq/compute-engine'
     runs-on: ubuntu-latest
     steps:
-      - uses: toolmantim/release-drafter@v5.25.0
+      - uses: toolmantim/release-drafter@v6.0.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}