Refactoring string for headers.

Author: ccreutzi

+llms/+internal/sendRequest.m

@@ -8,8 +8,8 @@
 
     % Define the headers for the API request
 
-    headers = matlab.net.http.HeaderField('Content-Type', 'application/json');
-    headers(2) = matlab.net.http.HeaderField('Authorization', 'Bearer ' + string(token));
+    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);
     % Send the request and store the response