collection.modify(name='new_name', metadata={'key': 'value'})

await collection.modify({ name: 'new_name', metadata: { key: 'value' } });

use chroma_types::Metadata;
let mut metadata = Metadata::new();
metadata.insert("key".to_string(), "value".into());
collection.modify(Some("new_name"), Some(metadata)).await?;

{}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}