Metadata correction for 2026.findings-acl.259

### JSON data block

```json
{
"anthology_id": "2026.findings-acl.259",
"authors": [
{
"first": "Shuoyang",
"last": "Sun",
"id": "shuoyang-sun"
},
{
"first": "Jiaxin",
"last": "Hong",
"id": "jiaxin-hong"
},
{
"first": "Yv",
"last": "Zhang",
"id": "yv-zhang"
},
{
"first": "Kuofeng",
"last": "Gao",
"id": "kuofeng-gao"
},
{
"first": "Hao",
"last": "Fang",
"id": "hao-fang"
},
{
"first": "Bin",
"last": "Chen",
"id": "bin-chen"
},
{
"first": "Shu-Tao",
"last": "Xia",
"id": "shu-tao-xia"
}
],
"authors_old": "Shuoyang Sun | Jiaxin Hong | Yv Zhang | Kuofeng Gao | Hao Fang | Fan Mo | Bin Chen | Shu-Tao Xia",
"authors_new": "Shuoyang Sun | Jiaxin Hong | Yv Zhang | Kuofeng Gao | Hao Fang | Bin Chen | Shu-Tao Xia",
"deleted_authors": [
{
"first": "Fan",
"last": "Mo",
"id": "fan-mo"
}
]
}
```