Remove wrong MR from patch release post

In https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4937 a duplicated changelog is removed. Therefore, this changelog entry is not valid for 8.9.1.

/cc @rspeicher @JobV 

See merge request !2458

Markdown Style Guide for about.GitLab.com

Closes #680 and #666 and #679 

Adding Kramdown (magic) guide to our Handbook/Marketing/Dev-Rel/Tech-Writing/ to facilitate writing content for GitLab's website and blog.

cc/ @axil @ashleys @amara 

See merge request !2373

First draft sick policy

\cc @tiffanie @brittanyr @pmachle for your input / review

See merge request !2462

move around recruiters paragraph

@ernstvn the scroll that goes with /jobs/#no-recruiters didn't work (that well), so I moved up (again?)

/cc @sytses 

See merge request !2464

Describe Sick Time accrual, recommend STD at state level



See merge request !1764

Exclude Options from License Grant

This commit specifically excludes Options for Enterprise Edition unless separately listed on the quote document.

See merge request !2450

Update to include ZD best practices to removing agents

Related: !2435

See merge request !2455

CEO authorizes, but hiring managers can make the offer

Revision of !2415 

See merge request !2444

Add note on infrastructure logging

This MR adds a brief explanation on how to log production events using issues and the _outage_ label

It also adds a format change that affects how the page is rendered.

cc/ @maratkalibek @northrup @jnijhof @yorickpeterse @stanhu 

Who else should be mentioned here?

See merge request !2460

Add James' import/export expertise to team page

/cc @DouweM 

See merge request !2459

Adding Support Lead job description.

Closes #707

See merge request !2456

remove blurb on page and image file

Relates to https://dev.gitlab.org/gitlab/organization/issues/906 

\cc @tiffanie @brittanyr 

See merge request !2461

Update social media handbook: "provide details"

Adding extra point to Social Media Guidelines Handbook: "**provide details**"

@sytses there we go, as you asked over the chat. Is that explained well enough? 

cc/ @ashleys @amara

See merge request !2446

Update "/contributing/" page

### What?

1. Linking '[community writers](https://about.gitlab.com/community/writers/)' page from '[contributing](https://about.gitlab.com/contributing/)' page
2. Removing "Pull" requests

### Why?

1. The "community writers" page isn't linked to any other page within about.GitLab.com
2. Pull requests aren't being accepted anymore from the GitHub mirror.

cc/ @axil @amara @afolson 
 


See merge request !2447

Add more promises inspired by https://news.ycombinator.com/item?id=11977129



See merge request !2448