`checkinstall` no longer part of debian

See merge request gitlab-org/gitlab!53912

13.9 upgrade warning for Geo

See merge request gitlab-org/gitlab!55501

Modify pypi documentation for dependency confusion

See merge request gitlab-org/gitlab!55085

Add graphql etag caching frontend

See merge request gitlab-org/gitlab!54321

Add mention of GitLab for Open Source program

See merge request gitlab-org/gitlab!55403

Fix inconsistent heading style in email diffs

See merge request gitlab-org/gitlab!55420

Update css to make vulnerability title more prominent

See merge request gitlab-org/gitlab!55389

Remove exception when tracking events using Redis HLL

See merge request gitlab-org/gitlab!55502

Upgrade to CodeQuality 0.85.23 in CI template

See merge request gitlab-org/gitlab!55508

Add qa-selector on checkout page

See merge request gitlab-org/gitlab!55428

Fix wrong message for group vulnerability report

See merge request gitlab-org/gitlab!55464

Collapse Deployments in Merge Request if Many

See merge request gitlab-org/gitlab!55239

If there are more than 4 deployments an MR has been deployed to (either
pre- or post-merge), put them in a collapsible container and collapse it
by default.

This does require a bit of expansion on the MrCollapsibleContainer
slightly, providing a slot to add "header text", which is not blue nor
clickable. This was done without touching the current slot or props, and
should be completely backwards compatible.

Autocorrect Graphql/Descriptions offenses

See merge request gitlab-org/gitlab!55430

Geo: Release package file verification

See merge request gitlab-org/gitlab!54361

Fix awkward phrasing in retarget messaging

See merge request gitlab-org/gitlab!55119

Rephrasing for better notes after a user deletes a target branch.

Experiment - Add group invite to registration [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!52371

- experiment to see if we get more acceptance.

Fix dangerbot pipeline failures

See merge request gitlab-org/gitlab!55374

Fix grammar issue in Abuse Reports page

See merge request gitlab-org/gitlab!55292

Add more context to the documentation about removing a FF locally

See merge request gitlab-org/gitlab!54272

GraphQL API reference docs: Query type fixes

See merge request gitlab-org/gitlab!55336

https://gitlab.com/gitlab-org/gitlab/-/issues/322508

De-emphasize nested reports in MR widget

See merge request gitlab-org/gitlab!55001

Clarify breaking changes in GraphQL docs

See merge request gitlab-org/gitlab!53176

Improve queueing and locking of builds exposed to runners [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!54579

Update Gitaly version

See merge request gitlab-org/gitlab!55510

Recommend Node 14 instead of 12

See merge request gitlab-org/gitlab!55465

Document `propagate_correlation_id` configuration for GitLab Pages

See merge request gitlab-org/gitlab!55205

Related to https://gitlab.com/gitlab-org/gitlab-pages/-/merge_requests/438

Update reference link for repository push issue

See merge request gitlab-org/gitlab!55495

Update OneLogin notes

See merge request gitlab-org/gitlab!55128