docs(README.md): mark Node 24 as LTS

[FrancescoBorzi]

https://nodejs.org/en/about/previous-releases

[coveralls]

Pull Request Test Coverage Report for Build 19209542271

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 54.898%

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Totals
Change from base Build 19201737032:	0.0%
Covered Lines:	9572
Relevant Lines:	12457

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💛 - Coveralls

[dhmlau]

@FrancescoBorzi, thanks for the PR. Could you please take a look at the code lint and commit lint error? Thanks.
For commit lint, I'd suggest the prefix to be: fix(docs):......