I found an error description in the document

## Description

Address：https://logging.apache.org/log4j/2.x/manual/appenders.html#log-archive-retention-policy-delete-on-rollover

In the second example of `Delete on Rollover`, 100 archives will be retained on the same hour, not day. Cause the filePattern is `"${baseDir}/$${date:yyyy-MM}/app-%d{yyyy-MM-dd-HH}-%i.log.gz"`, it will reset count to 0 at every hour.

The Original Text:

```
Below is a sample configuration that uses a RollingFileAppender with both the time and size based triggering policies, will create up to 100 archives on the same day (1-100) that are stored in a directory based on the current year and month
```

Should be corrected to: ... on the same ~~day~~ hour (1-100) ...