chore(deps): update actions/add-to-project action to v0.6.0 (#746)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

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

@@ -14,7 +14,7 @@ jobs:
           app_id: ${{ secrets.TOKENS_APP_ID }}
           private_key: ${{ secrets.TOKENS_PRIVATE_KEY }}
       - name: Add issue to Project
-        uses: actions/add-to-project@v0.5.0
+        uses: actions/add-to-project@v0.6.0
         with:
           project-url: https://github.com/orgs/netlify/projects/199
           github-token: ${{ steps.generate_token.outputs.token }}