Canvas cannot register font with em size `12`

## Issue or Feature
- [x] If this is an issue with installation, I have read the [troubleshooting guide](https://github.com/Automattic/node-canvas/issues/1511).

Canvas throws `Error: Could not parse font file` for a font with em size `12`, but works on the same font with em size `24`.

The only difference between [these two fonts](https://github.com/user-attachments/files/17171807/fonts.zip) are that the outlines have been scaled to twice their original size.

## Steps to Reproduce
```js
import path from 'path';
import { registerFont } from 'canvas';

const fontFile = (fileName: string) => path.join(__dirname, 'fonts/', fileName);
registerFont(fontFile('24-em-font.otf'), { family: 'Minecraft' });
registerFont(fontFile('12-em-font.otf'), { family: 'Minecraft' });
```

## Your Environment
* Version of node-canvas: `2.10.2`
* Environment: node `v18.20.4` on `Windows 10 (22H2)`