chore: add debugging to checkOnboardingBranch

lib/workers/repository/onboarding/branch/index.js

@@ -16,8 +16,10 @@ async function checkOnboardingBranch(config) {
   }
   logger.info('Repo is not onboarded');
   if (await onboardingPrExists(config)) {
+    logger.debug('Onboarding PR already exists');
     await rebaseOnboardingBranch(config);
   } else {
+    logger.debug('Onboarding PR does not exist');
     if ((await detectPackageFiles(config)).length === 0) {
       throw new Error('no-package-files');
     }