How to Upgrade Redis Database from 5.x to 6.x

This instance was running Redis version 5.0.8 open source. The Redis packages have been updated to the current 6.0.3 and now the server reports Loading RDB produced by version 5.0.8 on startup. What is the proper method for upgrading the RDB to the version of the server? I have checked the [admin documentation](https://redis.io/topics/admin) and there's nothing mentioned. Also, I checked the [6.0 release notes](https://raw.githubusercontent.com/antirez/redis/6.0/00-RELEASENOTES) and nothing there either.