text_splitters: add request parameters for function HTMLHeaderTextSplitter.split_text… (#24178)

**Description:**

The `split_text_from_url` method of `HTMLHeaderTextSplitter` does not
include parameters like `timeout` when using `requests` to send a
request. Therefore, I suggest adding a `kwargs` parameter to the
function, which can be passed as arguments to `requests.get()`
internally, allowing control over the `get` request.

---------

Co-authored-by: Chester Curme <chester.curme@gmail.com>

libs/text-splitters/langchain_text_splitters/html.py

@@ -71,13 +71,15 @@ class HTMLHeaderTextSplitter:
             for chunk in aggregated_chunks
         ]
 
-    def split_text_from_url(self, url: str) -> List[Document]:
+    def split_text_from_url(self, url: str, **kwargs: Any) -> List[Document]:
         """Split HTML from web URL
 
         Args:
             url: web URL
+            **kwargs: Arbitrary additional keyword arguments. These are usually passed
+                to the fetch url content request.
         """
-        r = requests.get(url)
+        r = requests.get(url, **kwargs)
         return self.split_text_from_file(BytesIO(r.content))
 
     def split_text(self, text: str) -> List[Document]: