I use this plugin to manage my ruby versions, and a repo I constantly work in just updated to ruby 3.4.3. I ran asdf plugin update ruby per the docs, but then when I ran asdf list all ruby | grep 3.4 I got this:
1.8.7-p334
1.8.7-p374
1.9.3-p374
2.3.4
3.3.4
3.4.0-preview1
3.4.0-preview2
3.4.0-rc1
3.4.0
3.4-dev
3.4.1
3.4.2
jruby-9.3.4.0
rbx-3.4
rbx-3.40
rbx-3.41
rbx-3.42
rbx-3.43
rbx-3.44
rbx-3.45
rbx-3.46
rbx-3.47
rbx-3.48
rbx-3.49
No 3.4.3 in the list. After about 30 mins of troubleshooting, I decided to uninstall and re-install the plugin and now I see 3.4.3 in the list.
So it appears that the asdf plugin update ruby does not actually update the ruby versions that are available for download.