collection.update(ids=['id1'], documents=['updated doc'], metadatas=[{'key': 'value'}])

await collection.update({ ids: ['id1'], documents: ['updated doc'], metadatas: [{ key: 'value' }] });

use chroma_types::UpdateMetadata;
let mut metadata = UpdateMetadata::new();
metadata.insert("key".to_string(), chroma_types::UpdateMetadataValue::Str("value".to_string()));
collection.update(
    vec!["id1".to_string()],
    None,
    Some(vec![Some("updated doc".to_string())]),
    None,
    Some(vec![Some(metadata)])
).await?;

{}