Remove unsupported overlay property for ReactRefreshWebpackPlugin

The v0.6.0 release introduced breaking changes which removed `sockPort` as a property https://github.com/pmmmwh/react-refresh-webpack-plugin/releases/tag/v0.6.0. (pr: pmmmwh/react-refresh-webpack-plugin#850). This updates the generator template for development.js to no longer pass the property. This was tested by successfully creating a new rails 8.0.2 project with ReactRefreshWebpackPlugin 0.6.1 and following the tutorial (https://www.shakacode.com/react-on-rails/docs/guides/tutorial/)

Author: jusleg

lib/generators/react_on_rails/templates/base/base/config/webpack/development.js.tt

@@ -13,11 +13,7 @@ const developmentEnvOnly = (clientWebpackConfig, _serverWebpackConfig) => {
     // eslint-disable-next-line global-require
     const ReactRefreshWebpackPlugin = require('@pmmmwh/react-refresh-webpack-plugin');
     clientWebpackConfig.plugins.push(
-      new ReactRefreshWebpackPlugin({
-        overlay: {
-          sockPort: devServer.port,
-        },
-      }),
+      new ReactRefreshWebpackPlugin({}),
     );
   }
 };