toktx error: JPGD_UNEXPECTED_MARKER

`toktx` (v4.0.0~6) fails when compressing [this JPEG](https://github.com/KhronosGroup/KTX-Software/assets/303516/4e10a2e3-eb22-4412-b2b6-7850c0d516d5).

```
% toktx bad-image.ktx bad-image.jpeg
toktx: failed to create image from bad-image.jpeg. JPEG decode failed
```

I got slightly more info when running in a different environment:
```
JPEG decode failed: JPGD_UNEXPECTED_MARKER
```

As far as I can tell the JPEG is well formed. GIMP says it has a color profile, which I know is a problem when compressing PNG files, but I have never had the problem with JPEGs before and the error message is opaque.

Possibly related to [this issue](https://github.com/richgel999/jpeg-compressor/issues/4), but I couldn't tell at a glance if you are using this decode library.

Start by reproducing the failure with the reported `toktx bad-image.ktx bad-image.jpeg` command and the linked JPEG asset. Trace the JPEG decoding path that emits `JPGD_UNEXPECTED_MARKER`; done means the reported JPEG is converted successfully and the failure behavior is covered or clearly explained.

Written by the indexing model from the issue text.