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@31b3f3c...0609a27)

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

Signed-off-by: dependabot[bot] <support@github.com>

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

@@ -24,7 +24,7 @@ jobs:
  allowed-endpoints: >
  api.github.com:443
 
- - uses: actions/add-to-project@31b3f3ccdc584546fc445612dec3f38ff5edb41c # v0.5.0
+ - uses: actions/add-to-project@0609a2702eefb44781da00f8e04901d6e5cd2b92 # v0.6.0
  with:
  project-url: https://github.com/orgs/Ouranosinc/projects/6
  github-token: ${{ secrets.ADD_TO_PROJECT_TOKEN }}