Confused by Zotero pop-up warning macOS compatibility.

I hope you can help. I had the following warning pop up appear whilst using Zotero with my Mac for Word:

macOS Upgrade Required
Citing in Word on an Apple Silicon Mac with macOS 11.3 or earlier is not supported and may cause Zotero to freeze. Please upgrade to macOS 11.4 or later.

However, I'm already running macOS Big Sur Version 11.5.1 so I have no idea why this is happening. Can anyone advise please?
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