bug: renovate.jsonc files are skipped by config validator hook

Problem

The renovate-config-validator hook will not run natively on renovate.jsonc files because the files regex does not match this file suffix. Per https://docs.renovatebot.com/configuration-options/ and https://github.com/renovatebot/renovate/pull/43677, .jsonc files should be natively supported.

Steps to Reproduce

Create a basic renovate.jsonc file:

{
  // Minimal JSONC Renovate config.
  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
  "extends": ["config:recommended"]
}

Create a basic .pre-commit-config.yaml:

repos:
  - repo: https://github.com/renovatebot/pre-commit-hooks
    rev: 43.256.1
    hooks:
      - id: renovate-config-validator

Run pre-commit, see that the .jsonc file is skipped:

❯ pre-commit run renovate-config-validator --files renovate.jsonc --verbose
renovate-config-validator............................(no files to check)Skipped
- hook id: renovate-config-validator

Proposed Solution

Update the file regex to support .jsonc
https://github.com/renovatebot/pre-commit-hooks/blob/b13b75918788a1dfe8fada6995adcab221087998/.pre-commit-hooks.yaml#L9

Start at .pre-commit-hooks.yaml line 9, where the hook's files regex is defined. Run the reported pre-commit command against renovate.jsonc before and after the change. Done means the hook no longer reports no files to check and runs on the JSONC file.