Update GH Actions - Githubissues

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	`v3` -> `v4`
mysql	service	major	`8.2` -> `9.0`
mysql	docker	major	`8.2` -> `9.0`
postgres	service	minor	`16.1-alpine` -> `16.4-alpine`
postgres	docker	minor	`16.1-alpine` -> `16.4-alpine`

actions/cache (actions/cache)

### [`v4`](https://togithub.com/actions/cache/compare/v3...v4) [Compare Source](https://togithub.com/actions/cache/compare/v3...v4)

📅 Schedule: Branch creation - "after 5am on the first day of the month" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

This PR was generated by Mend Renovate. View the repository job log.

crystal-lang / test-ecosystem