Fixed Session Cookie header

## What does this MR do?

This MR fixes the wiki text header for the Session Cookie section

## Are there points in the code the reviewer needs to double check?

It is markdown so probably not. Two very simple changes - first is replacing a dot with a space (was causing invalid markdown, not rendered as a header) and capitalized the word Cookie to match the other header formatting.

## Why was this MR needed?

Fix the wiki documentation.

## Screenshots (if relevant)

None.

## Does this MR meet the acceptance criteria?

I can't imagine it wouldn't.

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

I didn't think this warranted an issue as it  is just some simple wiki markdown formatting with little to no consequence.

See merge request !6584

# Conflicts:
#   doc/api/oauth2.md

This will allow the Koding app to enable the integration itself once is has authorized an admin user using the application secrets.

Expose project share expiration_date field on API

closes #22382

See merge request !6484

Expose pipeline data in builds API

Exposes pipeline data in builds API, as suggested by #22367.
The fields exposed were 'id', 'status', 'ref', and 'sha'.

Closes #22367

See merge request !6502

add pipeline ref, sha, and status to the build API response

add tests of build API (pipeline data)

change API documentation for builds API

log change to builds API in CHANGELOG

CHANGELOG: add reference to pull request and contributor's name

Fix typo `CSFR` -> `CSRF` in the OAuth2 doc



See merge request !6538