[latexrefman] Minor update

[Javier Bezos]

Hello,

I'd just to point out the following is no longer true:
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LaTeX has wide support for many of the world’s scripts and languages,
through the babel package and related support if you are using
pdfLaTeX, or polyglossia if you are using XeLaTeX or LuaLaTeX.

https://latexref.xyz/Accents.html
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Currently babel supports the three engines.

Best,
Javier