fix: take indices to messages as a hint #8537

	---
	name: Lint

	on:
	push:
	branches:
	- master
	pull_request:
	merge_group:

	concurrency:
	group: lint-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	lint:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Check formatting with Prettier
	uses: Nerixyz/actionsx-prettier@v3-adj
	with:
	# prettier CLI arguments.
	args: --write .
	- name: Show diff
	run: git --no-pager diff --exit-code --color=never
	shell: bash
	- name: Check Theme files
	run: \|
	npm i ajv-cli
	npx -- ajv validate -s docs/ChatterinoTheme.schema.json -d "resources/themes/*.json"

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