fix(datastructures): extend_header_value only reads the first duplicate header entry, dropping the rest #7951

	name: "Lint PR Title"

	on:
	pull_request:
	types:
	- opened
	- edited
	- synchronize

	jobs:
	main:
	name: Validate PR title
	runs-on: ubuntu-latest
	steps:
	- uses: actions/github-script@v9
	with:
	script: \|
	const title = context.payload.pull_request.title;

	const types = [
	"build",
	"chore",
	"ci",
	"docs",
	"feat",
	"fix",
	"perf",
	"refactor",
	"revert",
	"style",
	"test",
	];

	const pattern = new RegExp(`^(${types.join("\|")})(\$[^)]+\$)?!?: .+`);

	if (!pattern.test(title)) {
	core.setFailed(
	`PR title ${JSON.stringify(title)} is not a valid Conventional Commit.\n\n` +
	`Expected format: <type>(<optional scope>): <subject>\n` +
	`Allowed types: ${types.join(", ")}\n\n`
	);
	return;
	}

	console.log(`PR title ${JSON.stringify(title)} is valid.`);

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