update web_base.py to have verify option (#6107)

We propose an enhancement to the web-based loader initialize method by
introducing a "verify" option. This enhancement addresses the issue of
SSL verification errors encountered on certain web pages. By providing
users with the option to set the verify parameter to False, we offer
greater flexibility and control.
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### Fixes #6079 

#### Who can review?
@eyurtsev @hwchase17

---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

langchain/document_loaders/web_base.py

@@ -51,7 +51,10 @@ class WebBaseLoader(BaseLoader):
     """kwargs for requests"""
 
     def __init__(
-        self, web_path: Union[str, List[str]], header_template: Optional[dict] = None
+        self,
+        web_path: Union[str, List[str]],
+        header_template: Optional[dict] = None,
+        verify: Optional[bool] = True,
     ):
         """Initialize with webpage path."""
 
@@ -71,6 +74,9 @@ class WebBaseLoader(BaseLoader):
                 "bs4 package not found, please install it with " "`pip install bs4`"
             )
 
+        # Choose to verify
+        self.verify = verify
+
         headers = header_template or default_header_template
         if not headers.get("User-Agent"):
             try:
@@ -98,7 +104,7 @@ class WebBaseLoader(BaseLoader):
             for i in range(retries):
                 try:
                     async with session.get(
-                        url, headers=self.session.headers
+                        url, headers=self.session.headers, verify=self.verify
                     ) as response:
                         return await response.text()
                 except aiohttp.ClientConnectionError as e:
@@ -173,7 +179,7 @@ class WebBaseLoader(BaseLoader):
 
         self._check_parser(parser)
 
-        html_doc = self.session.get(url, **self.requests_kwargs)
+        html_doc = self.session.get(url, verify=self.verify, **self.requests_kwargs)
         html_doc.encoding = html_doc.apparent_encoding
         return BeautifulSoup(html_doc.text, parser)