💥 Bug: renaming Button.jsx to Button.js leads to an error

```
✘ [ERROR] This experimental syntax requires enabling one of the following parser plugin(s): "jsx", "flow", "typescript". (4:9) [plugin css-side-effects-plugin]

    app/routes/_index.jsx:1:19:
      1 │ import Button from "../components/Button";
        ╵                    ~~~~~~~~~~~~~~~~~~~~~~

  This error came from the "onLoad" callback registered here:

    node_modules/@remix-run/dev/dist/compiler/plugins/cssSideEffectImports.js:67:12:
      67 │       build.onLoad({
         ╵             ~~~~~~

    at setup (/home/xxxx/remix-issue-5331/node_modules/@remix-run/dev/dist/compiler/plugins/cssSideEffectImports.js:67:13)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at handlePlugins (/home/xxxx/remix-issue-5331/node_modules/esbuild/lib/main.js:1326:9)
```