Update class-testconfig.md

Signed-off-by: Alfie Jones <alfie.jones@hotmail.co.uk>
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@ -45,7 +45,7 @@ export default defineConfig({
- `caret` ?<[ScreenshotCaret]<"hide"|"initial">> See [`option: caret`] in [`method: Page.screenshot`]. Defaults to `"hide"`.
- `maxDiffPixels` ?<[int]> An acceptable amount of pixels that could be different, unset by default.
- `maxDiffPixelRatio` ?<[float]> An acceptable ratio of pixels that are different to the total amount of pixels, between `0` and `1` , unset by default.
- `scale` ?<[ScreenshotScale]<"css"|"device">> See [`option: scale`] in [`method: Page.screenshot`]. Defaults to `"css"`.
- `scale` ?<[ScreenshotScale]<"css"|"device">> See [`option: scale`] in [`method: Page.screenshot`]. Defaults to `"device"`.
- `stylePath` ?<[string]|[Array]<[string]>> See [`option: style`] in [`method: Page.screenshot`].
- `threshold` ?<[float]> An acceptable perceived color difference between the same pixel in compared images, ranging from `0` (strict) and `1` (lax). `"pixelmatch"` comparator computes color difference in [YIQ color space](https://en.wikipedia.org/wiki/YIQ) and defaults `threshold` value to `0.2`.
- `toMatchSnapshot` ?<[Object]> Configuration for the [`method: SnapshotAssertions.toMatchSnapshot#1`] method.