Translate react-19-upgrade-guide.md to Portuguese#954

NivaldoFarias wants to merge 1 commit intoreactjs:mainreactjs/pt-br.react.dev:mainfrom

NivaldoFarias:translate/blog/2024/04/25/react-19-upgrade-guide.mdNivaldoFarias/pt-br.react.dev:translate/blog/2024/04/25/react-19-upgrade-guide.mdCopy head branch name to clipboard