Fix file_system_monitor.cc message (ray-project#26143)

I'm seeing these errors

(raylet, ip=172.31.58.175) [2022-06-28 03:48:42,324 E 702775 702805] (raylet) file_system_monitor.cc:105: /mnt/data0/ray is over 0.95% full, available space: 50637901824. Object creation will fail if spilling is required.
They should be 95% instead of 0.95%.

src/ray/common/file_system_monitor.cc

@@ -103,8 +103,9 @@ bool FileSystemMonitor::OverCapacityImpl(
  }
 
  RAY_LOG_EVERY_MS(ERROR, 10 * 1000)
- << path << " is over " << capacity_threshold_
+ << path << " is over " << capacity_threshold_ * 100
  << "\% full, available space: " << space_info->available
+ << "; capacity: " << space_info->capacity
  << ". Object creation will fail if spilling is required.";
  return true;
 }