gptel: Update comments, indentation and test submodule

* gptel-curl.el: Remove obsolete comment.
* gptel.el (gptel--with-buffer-copy): Fix indentation.
* test: Update submodule.

Author: karthink

gptel-curl.el

@@ -112,8 +112,6 @@ REQUEST-DATA is the data to send, TOKEN is a unique identifier."
               collect (format "-H%s: %s" key val))
      (list url))))
 
-;;TODO: The :transformer argument here is an alternate implementation of
-;;`gptel-response-filter-functions'. The two need to be unified.
 ;;;###autoload
 (defun gptel-curl-get-response (fsm)
   "Fetch response to prompt in state FSM from the LLM using Curl.

gptel.el

@@ -1087,6 +1087,7 @@ Compatibility macro for Emacs 27.1."
   "Copy gptel's local variables from BUF to a temp buffer and run BODY.
 
 If positions START and END are provided, insert that part of BUF first."
+  (declare (indent 3))
   `(gptel--with-buffer-copy-internal ,buf ,start ,end (lambda () ,@body)))
 
 (defun gptel--with-buffer-copy-internal (buf start end body-thunk)