docs: small README tweaks following harness removal #13

	name: Vector Lint

	permissions:
	contents: read

	on:
	push:
	pull_request:

	jobs:
	build:
	name: Lint vectors/schemas
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: go.mod

	- name: Check if modules are tidy
	run: \|
	go mod tidy
	if [ -n "$(git status --porcelain go.mod go.sum)" ]; then
	echo "go.mod or go.sum are not tidy. Please run 'go mod tidy' locally and commit changes."
	git diff go.mod go.sum
	exit 1
	fi

	- name: Verify formatting
	# 'gofmt -l .' to list files whose formatting differs from gofmt's
	# 'test -z' to verify that the output is empty
	run: test -z "$(gofmt -l .)"

	- name: Run vectorlint
	run: go run ./tools/vectorlint

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