copyright scan error

### Description

> Please leave a brief description of the bug or feature request:

Copyright scan error occured.
```
{
"path": "source/.github/workflows/test.yaml",
"type": "file",
"detected_license_expression": null,
"detected_license_expression_spdx": null,
"license_detections": [],
"license_clues": [],
"percentage_of_license_text": 0,
"copyrights": [],
"holders": [],
"authors": [],
"scan_errors": [
"ERROR: for scanner: copyrights:\nERROR: Unknown error:\nTraceback (most recent call last):\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/scancode/interrupt.py\", line 91, in interruptible\n return NO_ERROR, func(*(args or ()), **(kwargs or {}))\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/scancode/api.py\", line 71, in get_copyrights\n copyrights, holders, authors = Detection.split(detections, to_dict=True)\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/cluecode/copyrights.py\", line 434, in split\n for detection in detections:\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/cluecode/copyrights.py\", line 110, in detect_copyrights\n numbered_lines = numbered_text_lines(location, demarkup=demarkup)\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/textcode/analysis.py\", line 116, in numbered_text_lines\n if demarkup and markup.is_markup(location):\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/textcode/markup.py\", line 67, in is_markup\n return is_markup_text(start)\n File \"/home/oscsystem/venv3/lib/python3.10/site-packages/textcode/markup.py\", line 72, in is_markup_text\n if text.startswith('<'):\nTypeError: startswith first arg must be bytes or a tuple of bytes, not str\n"
]
```

### How To Reproduce

> Tell us how to reproduce the issue.
1. Download the check source code : git clone https://github.com/go-check/check
2. Command : scancode -l -c --json-pp out.json check

### System configuration

> For bug reports, it really helps us to know:

* What OS are you running on? (Windows/MacOS/Linux) : **Linux 22.04 / python3.10.12**
* What version of scancode-toolkit was used to generate the scan file? : **32.2.1**
* What installation method was used to install/run scancode? (pip/source download/other) : **pip**