Fix issue links without '-' scope

doc/development/advanced_search.md

doc/development/gitaly.md

doc/development/lfs.md

doc/development/merge_request_concepts/diffs/index.md

doc/development/project_templates.md

doc/development/repository_mirroring.md

doc/development/secure_coding_guidelines.md

doc/integration/glab/index.md

doc/policy/alpha-beta-support.md

doc/raketasks/backup_restore.md

doc/user/application_security/dast/authentication.md

doc/user/project/clusters/runbooks/index.md

doc/user/project/issues/crosslinking_issues.md