Bump actions/add-to-project from 0.5.0 to 0.6.0

Bumps [actions/add-to-project](https://github.com/actions/add-to-project) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/actions/add-to-project/releases)
- [Commits](actions/add-to-project@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: actions/add-to-project
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/add-issues-to-projects.yml

@@ -11,7 +11,7 @@ jobs:
     name: Add issue to backlog
     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/cloudfoundry/projects/35
           github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}
@@ -20,7 +20,7 @@ jobs:
     name: Add epic to roadmap
     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/cloudfoundry/projects/29
           github-token: ${{ secrets.ADD_TO_PROJECT_PAT }}