ci: bump the github-actions group with 1 update (#155)

Bumps the github-actions group with 1 update: [actions/add-to-project](https://github.com/actions/add-to-project).


Updates `actions/add-to-project` from 0.6.1 to 1.0.0
- [Release notes](https://github.com/actions/add-to-project/releases)
- [Commits](actions/add-to-project@v0.6.1...v1.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

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

@@ -11,7 +11,7 @@ jobs:
     name: Add issue to project
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/add-to-project@v0.6.1
+      - uses: actions/add-to-project@v1.0.0
         with:
           project-url: https://github.com/orgs/elastic/projects/1286
           github-token: ${{ secrets.APM_TECH_USER_TOKEN }}