Clean up whitespace in docs

doc/administration/package_information/deprecation_policy.md

doc/ci/pipelines/job_artifacts.md

doc/integration/jenkins.md

doc/user/admin_area/settings/account_and_limit_settings.md

doc/user/application_security/api_fuzzing/index.md

doc/user/application_security/dast_api/index.md

doc/user/group/planning_hierarchy/index.md

doc/user/project/working_with_projects.md