src/vs/platform/extensionManagement/common/extensionGalleryService.ts/AbstractExtensionGalleryService/getChangelog
class AbstractExtensionGalleryService:	async getChangelog(extension: IGalleryExtension, token: CancellationToken): Promise<string> {
		if (extension.assets.changelog) {
			const context = await this.getAsset(extension.assets.changelog, {}, token);
			const content = await asText(context);
			return content || '';
		}
		return '';
	}