Update whitespace usage across CI docs

doc/ci/caching/index.md

doc/ci/cloud_deployment/ecs/deploy_to_aws_ecs.md

doc/ci/docker/using_docker_build.md

doc/ci/environments/index.md

doc/ci/index.md

doc/ci/review_apps/index.md

doc/ci/runners/index.md

doc/ci/runners/new_creation_workflow.md

doc/ci/runners/runners_scope.md

doc/ci/variables/index.md

doc/ci/yaml/index.md

doc/development/cicd/configuration.md

doc/development/cicd/pipeline_wizard.md

doc/development/contributing/verify/index.md

doc/development/pages/index.md

doc/development/pipelines/index.md

doc/development/pipelines/internals.md