解决跨系统下编码导致的乱码显示问题 (#3256)

Co-authored-by: Wendong-Fan <133094783+Wendong-Fan@users.noreply.github.com>

Author: 7946qinghuan

camel/toolkits/excel_toolkit.py

@@ -872,7 +872,7 @@ def export_sheet_to_csv(self, sheet_name: str, csv_filename: str) -> str:
             import csv
 
             with open(
-                resolved_csv_path, 'w', newline='', encoding='utf-8'
+                resolved_csv_path, 'w', newline='', encoding='utf-8-sig'
             ) as csvfile:
                 writer = csv.writer(csvfile)
                 writer.writerows(data)