Metadata correction for 2026.sigdial-1.56

### JSON data block

```json
{
"anthology_id": "2026.sigdial-1.56",
"authors": [
{
"first": "Vira",
"last": "Kasprova",
"id": "vira-kasprova/unverified"
},
{
"first": "Amruta",
"last": "Parulekar",
"id": "amruta-parulekar"
},
{
"first": "Abdulrahman",
"last": "AlRabah",
"id": "abdulrahman-alrabah/unverified"
},
{
"first": "Krishna",
"last": "Agaram",
"id": "krishna-agaram/unverified"
},
{
"first": "Ritwik",
"last": "Garg",
"id": "ritwik-garg/unverified"
},
{
"first": "Sagar",
"last": "Jha",
"id": "sagar-jha/unverified"
},
{
"first": "Nimet Beyza",
"last": "Bozdag",
"id": "nimet-beyza-bozdag"
},
{
"first": "Dilek",
"last": "Hakkani-Tür",
"id": "dilek-hakkani-tur"
}
],
"authors_old": "Vira Kasprova | Amruta Parulekar | Abdulrahman AlRabah | Krishna Agaram | Ritwik Garg | Sagar Jha | Nimet Beyza Bozdag | Dilek Hakkani-Tur",
"authors_new": "Vira Kasprova | Amruta Parulekar | Abdulrahman AlRabah | Krishna Agaram | Ritwik Garg | Sagar Jha | Nimet Beyza Bozdag | Dilek Hakkani-Tür"
}
```

Locate the metadata entry for `2026.sigdial-1.56` in the repository’s data files, since the issue gives the exact anthology ID and corrected payload. Compare the stored author string with `authors_old` and update it to match `authors_new`, including the `Hakkani-Tür` accent. There are no tests or file names mentioned, so validate completion by re-reading the edited record and confirming the final author list exactly matches the issue’s `authors_new` field.

Rédigé par le modèle d'indexation à partir du texte de l'issue.