message: fix: download button opens in new tab instead of downloading
  fixes
diff: @@ -81,7 +81,7 @@ export class ApiInfo extends React.Component<ApiInfoProps> {
  <p>
  Download OpenAPI specification:
  <DownloadButton
  - download={downloadFilename}
  + download={downloadFilename || true}
  target="_blank"
  href={downloadLink}
  onClick={this.handleDownloadClick}
  