chore: add codeowners

[tatomyr]

What/Why/How?

Currently, we review the changelog before the release, and if it needs to be corrected, we open yet another technical MR to fix the changesets. It's inconvenient and adds extra commits to the history.

Added @Redocly/technical-writers as the code owners of the .changeset/ folder to get future changelog entries reviewed earlier.

Also, added the docs/ folder under tech writers' ownership.

Also, updated the contributing guide.

Reference

Testing

Screenshots (optional)

Check yourself

• Code is linted
• Tested with redoc/reference-docs/workflows (internal)
• All new/updated code is covered with tests

Security

• Security impact of change has been considered
• Code follows company security practices and guidelines

[changeset-bot]

⚠️ No Changeset found

Latest commit: 16d4e2d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

Command	Mean [s]	Min [s]	Max [s]	Relative
redocly lint packages/core/src/benchmark/benches/rebilly.yaml	1.059 ± 0.025	1.018	1.112	1.00
redocly-next lint packages/core/src/benchmark/benches/rebilly.yaml	1.066 ± 0.021	1.034	1.095	1.01 ± 0.03

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	76.31%	4100/5373
🟡	Branches	66.29%	2183/3293
🟡	Functions	68.42%	663/969
🟡	Lines	76.51%	3847/5028

Test suite run success

671 tests passing in 94 suites.

Report generated by 🧪jest coverage report action from 16d4e2d

[lornajane]

I think this is a good idea, thanks!

[lornajane]

There is a fix for the failing documentation tests build task in #1387