fix(github): don’t keep processing resource not accessible

lib/workers/branch/index.js

@@ -307,6 +307,10 @@ async function processBranch(branchConfig, prHourlyLimitReached, packageFiles) {
       logger.debug('Passing disk-space error up');
       throw err;
     }
+    if (err.message.startsWith('Resource not accessible by integration')) {
+      logger.debug('Passing 403 error up');
+      throw err;
+    }
     if (err.message === 'update-failure') {
       logger.warn('Error updating branch: update failure');
     } else if (