Fix trailing spaces in the gitlab repository

doc/administration/gitaly/praefect.md

doc/administration/job_logs.md

doc/administration/packages/index.md

doc/api/appearance.md

doc/development/fe_guide/performance.md

doc/development/iterating_tables_in_batches.md

doc/development/product_analytics/usage_ping.md

doc/development/sidekiq_style_guide.md

doc/development/testing_guide/frontend_testing.md

doc/install/requirements.md

doc/integration/sourcegraph.md

doc/raketasks/backup_restore.md

doc/user/application_security/secret_detection/index.md

doc/user/group/saml_sso/index.md

doc/user/packages/conan_repository/index.md

doc/user/packages/index.md

doc/user/project/integrations/jira_server_configuration.md

doc/user/project/releases/index.md