You should always look at it and make sure nothing is wrong but generally you have no practical choice except to accept replacements.
Often, if you don’t accept the replacement, it will block the update due to dependencies.
Basically a replacement means that packaging changed. In this case, a package was renamed. Sometimes packages are combined, superceded or otherwise re-arranged.
You mean Arch Trusted Users. They make the package changes in their repos, and these happen from time to time. It’s good to question them and research/ask though!