Repository: explodinggradients/ragas
Issue: Example code in documentation not working after latest release - Faithfulness
Root cause: Documentation Deficiency

[x ] I have checked the [documentation](https://docs.ragas.io/) and related resources and couldn't resolve my bug.

**Describe the bug**
Execution example code in documentation fails for Faithfulness metric

Ragas version: 0.2.7
Python version: 3.10.12

**Code to Reproduce**
https://docs.ragas.io/en/latest/concepts/metrics/available_metrics/faithfulness/#faithfulness
```
from ragas.database_schema import SingleTurnSample 
from ragas.metrics import Faithfulness

sample = SingleTurnSample(
        user_input="When was the first super bowl?",
        response="The first superbowl was held on Jan 15, 1967",
        retrieved_contexts=[
            "The First AFL–NFL World Championship Game was an American football game played on January 15, 1967, at the Los Angeles Memorial Coliseum in Los Angeles."
        ]
    )
scorer = Faithfulness()
await scorer.single_turn_ascore(sample)
```

**Error trace**
```---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
Cell In[11], [line 1](vscode-notebook-cell:?execution_count=11&line=1)
----> [1](vscode-notebook-cell:?execution_count=11&line=1) from ragas.database_schema import SingleTurnSample 
      [2](vscode-notebook-cell:?execution_count=11&line=2) from ragas.metrics import Faithfulness
      [4](vscode-notebook-cell:?execution_count=11&line=4) sample = SingleTurnSample(
      [5](vscode-notebook-cell:?execution_count=11&line=5)         user_input="When was the first super bowl?",
      [6](vscode-notebook-cell:?execution_count=11&line=6)         response="The first superbowl was held on Jan 15, 1967",
   (...)
      [9](vscode-notebook-cell:?execution_count=11&line=9)         ]
     [10](vscode-notebook-cell:?execution_count=11&line=10)     )

ModuleNotFoundError: No module named 'ragas.database_schema'
```

**Expected behavior**
Documentation code to be updated to work with the latest version


**Additional context**
Add any other context about the problem here.

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Hi @sairampillai,

Thank you so much for bringing this to our attention! I’ve reviewed the issue and identified a minor error in the documentation, which I’ve now corrected. I appreciate your careful observation. Please feel free to run the code snippet below and let me know if you encounter any further difficulties. Let me know.

```python
import os
from dotenv import load_dotenv

load_dotenv()

from ragas.dataset_schema import SingleTurnSample
from ragas.metrics import Faithfulness

sample = SingleTurnSample(
    user_input="When was the first super bowl?",
    response="The first superbowl was held on Jan 15, 1967",
    retrieved_contexts=[
        "The First AFL–NFL World Championship Game was an American football game played on January 15, 1967, at the Los Angeles Memorial Coliseum in Los Angeles."
    ],
)

llm = ChatOpenAI(model="gpt-4o-mini")
evaluator_llm = LangchainLLMWrapper(llm)
scorer = Faithfulness(llm=evaluator_llm)
await scorer.single_turn_ascore(sample)
```