docs: Fix broken requests documentation links (#2111)

* Fix broken requests documentation links

* Update rest.py

* Update rest.py

---------

Co-authored-by: Edgar Ramírez Mondragón <16805946+edgarrmondragon@users.noreply.github.com>

singer_sdk/streams/rest.py

@@ -140,7 +140,7 @@ def requests_session(self) -> requests.Session:
             The `requests.Session`_ object for HTTP requests.
 
         .. _requests.Session:
-            https://requests.readthedocs.io/en/latest/api/#request-sessions
+            https://requests.readthedocs.io/en/latest/api.html#requests.Session
         """
         if not self._requests_session:
             self._requests_session = requests.Session()
@@ -175,7 +175,7 @@ def validate_response(self, response: requests.Response) -> None:
             RetriableAPIError: If the request is retriable.
 
         .. _requests.Response:
-            https://requests.readthedocs.io/en/latest/api/#requests.Response
+            https://requests.readthedocs.io/en/latest/api.html#requests.Response
         """
         if (
             response.status_code in self.extra_retry_statuses
@@ -329,9 +329,9 @@ def build_prepared_request(
             A `requests.PreparedRequest`_ object.
 
         .. _requests.PreparedRequest:
-            https://requests.readthedocs.io/en/latest/api/#requests.PreparedRequest
+            https://requests.readthedocs.io/en/latest/api.html#requests.PreparedRequest
         .. _requests.Request:
-            https://requests.readthedocs.io/en/latest/api/#requests.Request
+            https://requests.readthedocs.io/en/latest/api.html#requests.Request
         """
         request = requests.Request(*args, **kwargs)
         self.requests_session.auth = self.authenticator
@@ -589,7 +589,7 @@ def parse_response(self, response: requests.Response) -> t.Iterable[dict]:
             One item for every item found in the response.
 
         .. _requests.Response:
-            https://requests.readthedocs.io/en/latest/api/#requests.Response
+            https://requests.readthedocs.io/en/latest/api.html#requests.Response
         """
         yield from extract_jsonpath(self.records_jsonpath, input=response.json())