chore: update invalidate step in deploy workflow (#2120)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> Updates the docs GitHub Pages workflow to trigger
`invalidate-cloudfront.yaml` with a deployment field and log success.
> 
> - **CI/CD**
>   - **`.github/workflows/docs.yaml`**
>     - Update CloudFront cache invalidation step:
>       - Switch from `invalidate.yaml` to `invalidate-cloudfront.yaml`.
> - Add `--field deployment=apify-docs` and use a multiline script.
>       - Echo a success message after triggering the workflow.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
0c90445. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: markubra

.github/workflows/docs.yaml

@@ -52,6 +52,10 @@ jobs:
                 uses: actions/deploy-pages@v4
 
             -   name: Invalidate CloudFront cache
-                run: gh workflow run invalidate.yaml --repo apify/apify-docs-private
+                run: |
+                    gh workflow run invalidate-cloudfront.yml \
+                        --repo apify/apify-docs-private \
+                        --field deployment=apify-docs
+                    echo "✅ CloudFront cache invalidation workflow triggered successfully"
                 env:
                     GITHUB_TOKEN: ${{ secrets.APIFY_SERVICE_ACCOUNT_GITHUB_TOKEN }}