https://gitlab.com/gitlab-org/gitlab/-/merge_requests/28865 changed
attachment handling in reply-by-email and Service Desk issues and
accidentally caused `Content-Type` to be a required field. If no
`Content-Type` message is provided, `Mail::Message` returns `nil`, and
the attachment handler would fail. We now handle this `nil` value
gracefully.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/331658

Document apdex thresholds for Puma and Sidekiq job execution

See merge request gitlab-org/gitlab!62198

Add note about order gotcha

See merge request gitlab-org/gitlab!62261

Update tip on how to use Kubectl

See merge request gitlab-org/gitlab!61601

Added intro to Markdown page

See merge request gitlab-org/gitlab!62402

Update ffi from 1.13.1 to 1.15.1

See merge request gitlab-org/gitlab!62207

Bump rails gem version to 6.0.3.7

See merge request gitlab-org/gitlab!62347

Changelog: security

Add and fix various things in issues page refactor

See merge request gitlab-org/gitlab!62087

Remove `gitaly.client_path` and fix config.toml

See merge request gitlab-org/gitlab!61987

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/327171

Prevent retried builds from being retried again [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!62349

Update dependency @gitlab/svgs to v1.198.0

See merge request gitlab-org/gitlab!62290

Update queue_batched_background_migration not to duplicate migrations

See merge request gitlab-org/gitlab!62362

Set continuous onboarding rollout strategy to user

See merge request gitlab-org/gitlab!62392

Merge branch '321935-reduce-n-1-queries-from-projects-mergerequestscontroller-index-action-related-to-protected' into 'master'

Reduce N+1 queries from Projects::MergeRequestsController#index action related to protected branches and code owners

See merge request gitlab-org/gitlab!56775

Remove delayed_perform_for_build_hooks_worker [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!62196

Previously if a build were retried, we would still allow it to be
retried again. While this is convenient for running a build again, it
also means that a build can be retried again even if there is another
build running.

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/331361

Changelog: changed

Clarify how disabled issues influence auto closing [docs]

See merge request gitlab-org/gitlab!61694

Remove unused params from ElasticCommitIndexerWorker

See merge request gitlab-org/gitlab!62242

Adjust changelog step on security MR template

See merge request gitlab-org/gitlab!62324

Create 13.12 What's New entry

See merge request gitlab-org/gitlab!62247

This saves a few queries during the MR index listing

Changelog: performance
EE: true

Refactor tests to use group token instead of sandbox runner token

See merge request gitlab-org/gitlab!62368

Update Due dates page with minor edits

See merge request gitlab-org/gitlab!62383

Remove assigned open issue count background worker [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!62370

Remove more references to master in CI docs

See merge request gitlab-org/gitlab!61973

Edit Fuzzing docs metadata

See merge request gitlab-org/gitlab!62357

Remove load_balancing_for_build_hooks_worker FF for BuildHooksWorker [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!61905

Add cc validation checkbox to admin users panel

See merge request gitlab-org/gitlab!62160

Revise Due dates page with several minor edits.

Experiment cleanup: Optionally start a trial during free signup [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!62174