[Bug Fix] Fix issue of loading other languages in csv file

[Ukong0324]

Description

An error occurred in the process of loading csv written in Korean, so the reading method was fixed.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Converted read process to utf-8 and loaded csv file

Example csv

이름,전화번호
테스트,010-1234-5678

Test Source

import os
from embedchain import App
from dotenv import load_dotenv

load_dotenv()
openai_api_key = os.getenv('OPENAI_API_KEY')

app = App()
app.add('/path/to/file.csv', data_type='csv')  # type: ignore
app.query("테스트 전화번호")

• Test Script (please provide)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed