Add note about not needing jsx-no-undef with typescript-eslint

[karlhorky]

Hi @ljharb, hope everything is going well! 👋

Quick PR to add an additional case of when to not use react/jsx-no-undef - the @typescript-eslint/parser parser allows for usage of ESLint's built-in no-undef without react/jsx-no-undef:

• https://typescript-eslint.io/play/#ts=5.7.2&fileType=.tsx&code=DwCQpgNhD2AEB2BDAtmAvAIgFLQBbw1gHoA%2BAbgCgg&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQHYHsBaWXAE0QDN0pFpp9pJwwBfEFoA&tsconfig=N4KABGBEDGD2C2AHAlgGwKYCcDyiAuysAdgM6QBcYoEEkJemy0eAcgK6qoDCAFutAGsylBm3TgwAXxCSgA&tokens=false

This applies to:

1. .tsx files (as demonstrated in the typescript-eslint Playground link)
2. .jsx or .js files - also without "allowJs": true or "checkJs": true in tsconfig.json.