Unicorn 5.3.1 fixes a GC issue that causes a crash, and Unicorn 5.4.1
quiets some warnings for Ruby 2.6. More details:

https://github.com/defunkt/unicorn/releases

Reviewer roulette via Danger

Closes #56087

See merge request gitlab-org/gitlab-ce!24938

Resolve "Merge Request Tabs Header is missing bottom border"

Closes #57160

See merge request gitlab-org/gitlab-ce!25198

API: Fix docs and parameters for hangouts-chat service

Closes #57101

See merge request gitlab-org/gitlab-ce!25180

Make danger pick reviewers and maintainers at random, for feontend,
backend, database, etc, changes, whenever files belonging to those
teams get changed.

Only require one parameter when updating a Wiki via the API

Closes #39676

See merge request gitlab-org/gitlab-ce!25191

Update Workhorse to v8.3.1

Closes #57589

See merge request gitlab-org/gitlab-ce!25188

Merge branch '57382-add-documentation-how-to-track-an-event-to-frontend-documentation' into 'master'

Resolve "Add documentation "How to track an event" to Frontend documentation"

Closes #57382

See merge request gitlab-org/gitlab-ce!24995

- Add link to Event tracking in FE guides

Fixed diff rendering causing a duplicate key warning

Closes #56797

See merge request gitlab-org/gitlab-ce!24634

Fix a typo

See merge request gitlab-org/gitlab-ce!25152

Fix typo. "sysdamin" is a misspelling of "sysadmin".

See merge request gitlab-org/gitlab-ce!25151

Fix a typo in doc/development/documentation/styleguide.md

See merge request gitlab-org/gitlab-ce!25149

API: Expose full commit title

Closes #56237

See merge request gitlab-org/gitlab-ce!25189

add title attr to display file name

See merge request gitlab-org/gitlab-ce!25154

Add milestone progress to API

Closes #50559

See merge request gitlab-org/gitlab-ce!25173

Fix pages admin documentation reference to subgroups

See merge request gitlab-org/gitlab-ce!25163

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/56797

Support `only: changes:` on MR pipelines

See merge request gitlab-org/gitlab-ce!24490

Add support for FTP assets for releases

Closes #57410

See merge request gitlab-org/gitlab-ce!25071

Extend the list of supported protocols to include FTP.

Documentation: Development guide for Kubernetes

See merge request gitlab-org/gitlab-ce!24618

Resolve "Expose textcolor from public labels API"

Closes #50006

See merge request gitlab-org/gitlab-ce!25172

CE Backport: Fix unleash server side cannot return feature flags

See merge request gitlab-org/gitlab-ce!25185

Apply nice suggestions

Docs: Fixing path in links in api release doc

See merge request gitlab-org/gitlab-ce!24975

Fix a typo in ./doc/ci/examples/deploy_spring_boot_to_cloud_foundry/index.md from "deafult" to "default".

See merge request gitlab-org/gitlab-ce!25153

Update what supports U2F workflow

See merge request gitlab-org/gitlab-ce!25047

Upgrade gitaly to 1.19.1

See merge request gitlab-org/gitlab-ce!25177