Upgrade @netlify/plugin-nextjs to latest

[pettinarip]

This upgrade fix a ESM require error that is blocking our revalidation process.

Oct 20, 12:01:31 PM: 982cee58 ERROR  Error [ERR_REQUIRE_ESM]: require() of ES Module /var/task/next-i18next.config.js from /var/task/node_modules/next-i18next/dist/commonjs/serverSideTranslations.js not supported.
next-i18next.config.js is treated as an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which declares all .js files in that package scope as ES modules.
Instead either rename next-i18next.config.js to end in .cjs, change the requiring code to use dynamic import() which is available in all CommonJS modules, or change "type": "module" to "type": "commonjs" in /var/task/package.json to treat all .js files as CommonJS (using .mjs for all ES modules instead).

    at mod.require (/var/task/node_modules/next/dist/server/require-hook.js:65:28)
    at /var/task/node_modules/next-i18next/dist/commonjs/serverSideTranslations.js:98:46 {
  code: 'ERR_REQUIRE_ESM'
}

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