Docs maintenance: Delete trailing whitespace

doc/administration/backup_restore/restore_gitlab.md

doc/administration/package_information/supported_os.md

doc/administration/raketasks/maintenance.md

...administration/sidekiq/processing_specific_job_classes.md

doc/ci/yaml/artifacts_reports.md

doc/development/ai_features/duo_chat.md

doc/development/feature_flags/index.md

doc/integration/jira/connect-app.md

doc/integration/saml.md

doc/user/analytics/index.md

..._testing/checks/sensitive_information_disclosure_check.md

...ation_security/continuous_vulnerability_scanning/index.md

...lication_security/dast/browser/configuration/variables.md

doc/user/application_security/sast/gitlab_advanced_sast.md

doc/user/gitlab_duo/data_usage.md

doc/user/project/import/bitbucket.md

doc/user/project/import/bitbucket_server.md

doc/user/project/import/github.md

doc/user/project/integrations/webhook_events.md