Migrate deprecating GitHub API authentication through query parameters

[peaceiris]

Maybe, we need to migrate the API authentication in the following lines.

gh-card/backend/src/infra/DefaultGitHubApiService.ts

Lines 20 to 37 in 1abc38d

	let query = '';
	const headers= (() => {
	if (this.githubCredential === undefined) {
	return {};
	} else {
	const {githubClientId, githubClientSecret} = this.githubCredential;
	const h: {[key: string]: string} = {
	// Basic Auth
	"Authorization": `Basic: ${Buffer.from(`${githubClientId}:${githubClientSecret}`).toString("base64")}`,
	};
	query = `?client_id=${githubClientId}&client_secret=${githubClientSecret}`;
	return h;
	}
	})();
	const githubRes = await fetch(`https://api.github.com/repos/${repoName}${query}`, {
	headers,
	});

• For more details, Deprecating API authentication through query parameters | GitHub Developer Guide
• Related #590
• Sunset Notice: API Authentication via Query Parameters | GitHub Changelog