Bump aws-actions/amazon-ecs-render-task-definition from 1.4.0 to 1.6.0

Bumps [aws-actions/amazon-ecs-render-task-definition](https://github.com/aws-actions/amazon-ecs-render-task-definition) from 1.4.0 to 1.6.0.
- [Release notes](https://github.com/aws-actions/amazon-ecs-render-task-definition/releases)
- [Changelog](https://github.com/aws-actions/amazon-ecs-render-task-definition/blob/master/CHANGELOG.md)
- [Commits](aws-actions/amazon-ecs-render-task-definition@v1.4.0...v1.6.0)

---
updated-dependencies:
- dependency-name: aws-actions/amazon-ecs-render-task-definition
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
 
       - name: Fill in the new image ID in the Amazon ECS task definition
         id: task-def
-        uses: aws-actions/amazon-ecs-render-task-definition@v1.4.0
+        uses: aws-actions/amazon-ecs-render-task-definition@v1.6.0
         with:
           task-definition: .github/workflows/task.json
           container-name: website