Add note on configuring an external Redis Sentinel instance

See merge request gitlab-org/gitlab-ce!25436

Adding password in the Redis Sentinel config does not actually work
because v3.2.x doesn't respond to the `AUTH` command.

This came up in
https://gitlab.com/gitlab-org/omnibus-gitlab/issues/4126.

Docs: Move chatops docs from EE to core

See merge request gitlab-org/gitlab-ce!25324

ChatOps used to be in the Ultimate tier.

Docs: Port "Move chatops docs from EE to core" to EE

See merge request gitlab-org/gitlab-ee!9586

Docs: document upgrade k8s apps

See merge request gitlab-org/gitlab-ce!25323

Clarify that Owners have permissions to change visibility.

See merge request gitlab-org/gitlab-ce!25356

Team Member Removed: "project_access" changed to "access_level".  Team Member...

See merge request gitlab-org/gitlab-ce!25306

Move language setting to preferences

Closes #35638

See merge request gitlab-org/gitlab-ce!25427

Template and process improvements for documentation

See merge request gitlab-org/gitlab-ce!24315

Port of move_chatops_to_core to EE

See merge request gitlab-org/gitlab-ee!9350

Move ChatOps to Core

See merge request gitlab-org/gitlab-ce!24780

ChatOps used to be in the Ultimate tier.

Geo: Fix SSH push proxy

Closes gitlab-org/quality/nightly#77 and gitlab-org/quality/nightly#78

See merge request gitlab-org/gitlab-ee!9597

fix #39010 - add left margin to 1st time contributor badge

Closes #39010

See merge request gitlab-org/gitlab-ce!25216

Document how to enable feature flags for Review Apps

See merge request gitlab-org/gitlab-ce!25399

Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix GroupSAML metadata feature flag

See merge request gitlab-org/gitlab-ee!9602

Ignore revert commits

Closes #57912

See merge request gitlab-org/gitlab-ce!25396

Fix merge button disabled when MR is approved

See merge request gitlab-org/gitlab-ee!9606

Similar to what's done on API endpoint.

Quarantine failing test

See merge request gitlab-org/gitlab-ce!25424

Docs: change badges.svg example to pipeline.svg

See merge request gitlab-org/gitlab-ce!25157