Fix 404 external links in docs

doc/api/rest/index.md

doc/ci/migration/teamcity.md

doc/development/contributing/design.md

doc/development/internal_analytics/index.md

...l_analytics/internal_event_instrumentation/quick_start.md

doc/install/aws/index.md

doc/integration/mattermost/index.md

doc/user/application_security/dependency_scanning/index.md

...er/application_security/gitlab_advisory_database/index.md

doc/user/packages/workflows/build_packages.md

doc/user/project/repository/mirror/bidirectional.md