Replace NodeJS 21 with 22 in devEngines field

[kassens]

21 is EOL and 22 is stable now.

Homebrew installs 22 by default as well which is the practical reason for me to update this.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
react-compiler-playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 5, 2024 6:26pm

[react-sizebot]

Comparing: 6590358...8915ec6

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.82 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	500.37 kB	500.37 kB	=	89.80 kB	89.80 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	507.50 kB	507.50 kB	=	90.96 kB	90.96 kB
facebook-www/ReactDOM-prod.classic.js	=	595.24 kB	595.24 kB	=	105.56 kB	105.55 kB
facebook-www/ReactDOM-prod.modern.js	=	571.54 kB	571.54 kB	=	101.75 kB	101.75 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against a00633e