build(deps): bump actions/add-to-project from 1.0.2 to 2.0.0 (#25)

Bumps [actions/add-to-project](https://github.com/actions/add-to-project) from 1.0.2 to 2.0.0.
- [Release notes](https://github.com/actions/add-to-project/releases)
- [Commits](actions/add-to-project@244f685...5afcf98)

---
updated-dependencies:
- dependency-name: actions/add-to-project
  dependency-version: 2.0.0
  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>

Author: dependabot[bot]

.github/workflows/add_to_backlog.yml

@@ -16,7 +16,7 @@ jobs:
     name: Add issue or PR to OctoPrint Backlog project
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v1.0.2
+      - uses: actions/add-to-project@5afcf98fcd03f1c2f92c3c83f58ae24323cc57fd # v2.0.0
         with:
           project-url: https://github.com/orgs/OctoPrint/projects/6
           github-token: ${{ secrets.BACKLOG_PROJECT_ACCESS }}