chore: Improve warning message in SetConfig command

[CarrotManMatt]

Summary

Fixes a spelling mistake in the log message shown to administrators when updating a config value in such a way that could cause breakages.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

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• No AI was used in creating the content of this PR

[joshtrichards]

👍 Maybe we can tighten up the overall message while we're here

The commit message needs to be conventional style too or it won't pass tests. Please edit it.

[CarrotManMatt]

Many thanks for the suggestions @joshtrichards! I admit I'm not too well-versed in the correct "conventional style" for commit messages so have marked it as chore:. If this is wrong and it should be fix: or something else, let me know and I can change it again.