chore(deps): update dependency slevomat/coding-standard to v8.12.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
slevomat/coding-standard	require-dev	minor	8.11.1 -> 8.12.0

---

Release Notes

slevomat/coding-standard

### [`v8.12.0`](https://togithub.com/slevomat/coding-standard/releases/tag/8.12.0) [Compare Source](https://togithub.com/slevomat/coding-standard/compare/8.11.1...8.12.0) ## 🆕 New sniffs - `SlevomatCodingStandard.Arrays.ArrayAccess`: Disallow whitespace between array access operator and the variable, or between array access operators (thanks to [@​kamil-zacek](https://togithub.com/kamil-zacek)) ## 🐛 Fixes - `SlevomatCodingStandard.Classes.ClassStructure`: Fixed fixer - `SlevomatCodingStandard.ControlStructures.RequireNullSafeObjectOperator`: Fixed false positive - `SlevomatCodingStandard.Namespaces.ReferenceUsedNamesOnly`: Fixes - `SlevomatCodingStandard.Arrays.DisallowPartiallyKeyed`: Fixed false positive

---

Configuration

📅 Schedule: Branch creation - "before 3am on Monday" (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.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.