[BUG] dataset_info sequence unexpected behavior in README.md YAML
### Describe the bug

When working on `dataset_info` yaml, I find my data column with format `list[dict[str, str]]` cannot be coded correctly.

My data looks like
```
{"answers":[{"text": "ADDRESS", "label": "abc"}]}
```

My `dataset_info` in README.md is:
```
dataset_info:
- config_name: default
  features:
  - name: answers
    sequence:
    - name: text
      dtype: string
    - name: label
      dtype: string
```

**Error log**:
```
pyarrow.lib.ArrowNotImplementedError: Unsupported cast from list<item: struct<text: string, label: string>> to struct using function cast_struct
```

## Potential Reason
After some analysis, it turns out that my yaml config is requiring `dict[str, list[str]]` instead of `list[dict[str, str]]`. It would work if I change my data to
```
{"answers":{"text": ["ADDRESS"], "label": ["abc", "def"]}}
```

These following 2 different `dataset_info` are actually equivalent.

```
dataset_info:
- config_name: default
  features:
  - name: answers
    dtype:
    - name: text
      sequence: string
    - name: label
      sequence: string

dataset_info:
- config_name: default
  features:
  - name: answers
    sequence:
    - name: text
      dtype: string
    - name: label
      dtype: string
```



### Steps to reproduce the bug


```
# README.md
---
dataset_info:
- config_name: default
  features:
  - name: answers
    sequence:
    - name: text
      dtype: string
    - name: label
      dtype: string
configs:
- config_name: default
  default: true
  data_files:
  - split: train
    path:
    - "test.jsonl"
---



# test.jsonl

# expected but not working
{"answers":[{"text": "ADDRESS", "label": "abc"}]}

# unexpected but working
{"answers":{"text": ["ADDRESS"], "label": ["abc", "def"]}}

```

### Expected behavior

```
dataset_info:
- config_name: default
  features:
  - name: answers
    sequence:
    - name: text
      dtype: string
    - name: label
      dtype: string
```
Should work on following data format:

```
{"answers":[{"text":"ADDRESS", "label": "abc"}]}
```

### Environment info

- `datasets` version: 2.21.0
- Platform: macOS-14.6.1-arm64-arm-64bit
- Python version: 3.12.4
- `huggingface_hub` version: 0.24.5
- PyArrow version: 17.0.0
- Pandas version: 2.2.2
- `fsspec` version: 2024.6.1