build(deps): bump third_party/tools/circt-verilog from `257815e` to `fb8421d` #5206

	name: lint-review
	on:
	pull_request:

	jobs:
	lint_review:
	runs-on: ubuntu-latest
	permissions:
	checks: write
	contents: read
	pull-requests: write
	steps:
	- uses: actions/checkout@v2
	- name: Run Verible action
	uses: chipsalliance/verible-linter-action@main
	with:
	paths:
	./tests
	github_token: ${{ secrets.GITHUB_TOKEN }}
	suggest_fixes: 'false'

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