fixing header dimension.

Author: debymf

+llms/+internal/sendRequest.m

@@ -8,7 +8,7 @@
 
     % Define the headers for the API request
 
-    headers = [matlab.net.http.HeaderField('Content-Type', 'application/json');
+    headers = [matlab.net.http.HeaderField('Content-Type', 'application/json')...
                matlab.net.http.HeaderField('Authorization', "Bearer " + token)];
     % Define the request message
     request = matlab.net.http.RequestMessage('post',headers,parameters);

tests/topenAIChat.m

@@ -28,6 +28,13 @@ function generateAcceptsSingleStringAsInput(testCase)
             testCase.verifyWarningFree(@()generate(chat,"This is okay"));
         end
 
+        function generateAcceptsMessagesAsInput(testCase)
+            chat = openAIChat(ApiKey="this-is-not-a-real-key");
+            messages = openAIMessages;
+            messages = addUserMessage(messages, "This should be okay.");
+            testCase.verifyWarningFree(@()generate(chat,messages));
+        end
+
         function keyNotFound(testCase)
             testCase.verifyError(@()openAIChat, "llms:keyMustBeSpecified");
         end