Fix trailing whitespace in files

doc/administration/license.md

doc/architecture/blueprints/ai_gateway/index.md

.../blueprints/container_registry_metadata_database/index.md

doc/ci/cloud_services/aws/index.md

doc/ci/testing/code_quality.md

doc/development/ai_features/duo_chat.md

doc/security/webhooks.md

doc/update/zero_downtime.md

doc/user/application_security/dast_api/checks/index.md

...curity/dast_api/checks/sensitive_file_disclosure_check.md

...ecurity/dast_api/checks/tls_server_configuration_check.md

doc/user/group/saml_sso/troubleshooting.md

doc/user/project/integrations/google_artifact_registry.md

doc/user/project/integrations/redmine.md

doc/user/project/project_topics.md