mjs (Why lib/ or light-base/ alone forces an npm bump: wasm-node/javascript/prepare.mjs compiles smoldot-light-wasm at pack time) marked as capitalization problem

**What got flagged?**
mjs

**Why is this incorrect?**
mjs (Why lib/ or light-base/ alone forces an npm bump: wasm-node/javascript/prepare.mjs compiles smoldot-light-wasm at pack time) marked as capitalization problem. File name in this case (In Node.js, .mjs is a file extension used to indicate that a JavaScript file uses ES modules with import/export syntax instead of CommonJS's require/module.exports.)

**Example of correct usage:**
No capitalization problems.

Reproduce the capitalization warning for `mjs`, then inspect Harper's capitalization-checking entry point and the `wasm-node/javascript/prepare.mjs` example mentioned in the issue. Done means `.mjs` is accepted as a file extension while genuine capitalization problems continue to be reported.

Written by the indexing model from the issue text.