update the config key to address an issue

Author: lukesandberg

packages/next/src/build/webpack-config.ts

@@ -2370,6 +2370,7 @@ export default async function getBaseWebpackConfig(
     emotion: config.compiler?.emotion,
     modularizeImports: config.modularizeImports,
     imageLoaderFile: config.images.loaderFile,
+    i18n: config.i18n,
     clientTraceMetadata: config.experimental.clientTraceMetadata,
     serverSourceMaps: config.experimental.serverSourceMaps,
     serverReferenceHashSalt: encryptionKey,