fix(browser_base_fetch): correct function signature and async_mode handling

- Added missing `async_mode` parameter to the function signature.

Author: tuhinmallick

scrapegraphai/docloaders/browser_base.py

@@ -3,7 +3,7 @@
 """
 from typing import List
 
-def browser_base_fetch(api_key: str, project_id: str, link: List[str], text_content: bool = True) -> List[str]:
+def browser_base_fetch(api_key: str, project_id: str, link: List[str], text_content: bool = True, async_mode: bool = False) -> List[str]:
     """
     BrowserBase Fetch