docs: cleanup recommendations of using Babel preset

[layershifter]

This PR removes mentions and recommendations to use directly @griffel/babel-preset as we don't recommend to do this on distributable packages side anymore as it blocks features like #453.

See for more context microsoft/fluentui#31134.

Also, bumps Docusaurus to latest.

[github-actions]

📊 Bundle size report

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
core __resetStyles (makeResetStyles)	273 B 197 B
core __styles (makeStyles)	1.727 kB 832 B
core makeResetStyles (runtime)	17.21 kB 6.588 kB
core makeStyles (runtime)	26.043 kB 9.3 kB
core mergeClasses	1.865 kB 900 B
core shorthands.padding()	4.781 kB 1.537 kB
react __css	1.723 kB 812 B
react __styles	4.187 kB 1.832 kB
react makeResetStyles (runtime)	19.71 kB 7.578 kB
react makeStaticStyles (runtime)	9.638 kB 4.197 kB
react makeStyles (runtime)	28.548 kB 10.298 kB
shadow-dom createShadowDOMRenderer	4.085 kB 1.724 kB

_{🤖 This report was generated against 6b960b7b802ee052eccbfb8a3be76a7118d81268}