Merge pull request #576 from okp4/dependabot/github_actions/actions/add-to-project-0.6.0

Author: dependabot[bot]

.github/workflows/add-to-project.yml

@@ -10,7 +10,7 @@ jobs:
     name: Add issue to project
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/add-to-project@v0.5.0
+      - uses: actions/add-to-project@v0.6.0
         with:
           project-url: https://github.com/orgs/okp4/projects/9
           github-token: ${{ secrets.OKP4_TOKEN }}