fix: log error response body if present

lib/workers/repository/error.js

@@ -59,8 +59,12 @@ async function handleError(config, err) {
   }
   // Swallow this error so that other repositories can be processed
   logger.error(
-    { err, message: err.message },
-    `Repository has unknown error:\n${stringify(err, null, 2)}`
+    {
+      err,
+      message: err.message,
+      body: err.response ? err.response.body : undefined,
+    },
+    `Repository has unknown error`
   );
   // delete branchList to avoid cleaning up branches
   delete config.branchList; // eslint-disable-line no-param-reassign