refactor: log err.headers when rate limit exceeded

lib/platform/github/gh-got-wrapper.js

@@ -108,7 +108,7 @@ async function get(path, options, retries = 5) {
       err.message &&
       err.message.includes('rate limit exceeded')
     ) {
-      logger.info({ err }, 'Rate limit exceeded');
+      logger.info({ err, headers: err.headers }, 'Rate limit exceeded');
       throw new Error('rate-limit-exceeded');
     } else if (
       err.statusCode === 403 &&