chore: improve `renderComponentRoot` warn message

[btea]

If the subcomponent root element is Teleport, inheriting classes or events will also fail.

[github-actions[bot]]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	90.7 kB	34.5 kB	31.1 kB
vue.global.prod.js	148 kB	53.7 kB	48 kB

Usages

Name	Size	Gzip	Brotli
createApp	50.8 kB	19.9 kB	18.1 kB
createSSRApp	54.1 kB	21.2 kB	19.3 kB
defineCustomElement	53.1 kB	20.6 kB	18.8 kB
overall	64.5 kB	24.9 kB	22.6 kB