docs: update changelogs

[MikeMcC399]

• relates to issue https://github.com/cypress-io/cypress-docker-images/issues/889

Issue

Changelogs, except for the factory/CHANGELOG.md, contain outdated, unmaintained content:

• base/CHANGELOG.md
• browsers/CHANGELOG.md
• included/CHANGELOG.md

Change

Remove the list contents and add links to the last commit where the corresponding CHANGELOG was last updated. This enables viewing of the archived content without presenting it by default.

[cypress-app-bot]

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.

[MikeMcC399]

Preview

• base/CHANGELOG.md
• browsers/CHANGELOG.md
• included/CHANGELOG.md

[MikeMcC399]

@jennifer-shehane

Looks great!

Thanks! There is more clean-up to come. I hope to have some other related PRs in the next few days.