chore: downgrade closed PR warning to info

lib/workers/branch/index.js

@@ -89,7 +89,8 @@ async function processBranch(branchConfig) {
           return 'pr-edited';
         }
       } else {
-        logger.warn({ pr }, 'PR state is not open');
+        logger.info('PR state is not open - aborting');
+        logger.debug({ pr });
         return 'pr-closed';
       }
     }