chore(deps): bump actions/add-to-project from 0.5.0 to 0.6.1

Bumps [actions/add-to-project](https://github.com/actions/add-to-project) from 0.5.0 to 0.6.1.
- [Release notes](https://github.com/actions/add-to-project/releases)
- [Commits](actions/add-to-project@v0.5.0...v0.6.1)

---
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/pr-issues-project.yaml

@@ -36,7 +36,7 @@ jobs:
         private_key: ${{ secrets.PROJECT_APP_PRIVATE_KEY }}
 
     - name: Add PR or issue to DevOps Stack project board
-      uses: actions/add-to-project@v0.5.0
+      uses: actions/add-to-project@v0.6.1
       with:
         project-url: https://github.com/orgs/camptocamp/projects/3/
         github-token: ${{ steps.generate_token.outputs.token }}