Switch specialErrorForUnsupportedResponseFormat to other deployment

The gpt-4o deployment no longer errors for structured output (after
model update). Switch to a deployment that does error.

Author: ccreutzi

tests/tazureChat.m

@@ -137,10 +137,8 @@ function canUseAPIVersions(testCase, APIVersions)
         end
 
         function specialErrorForUnsupportedResponseFormat(testCase)
-            % Our "gpt-4o" deployment has the model version 2024-05-13,
-            % which does not support structured output
             testCase.verifyError(@() generate(...
-                azureChat(DeploymentID="gpt-4o"), ...
+                azureChat(DeploymentID="o1-mini"), ...
                 "What is the smallest prime?", ...
                 ResponseFormat=struct("number",1)), ...
                 "llms:noStructuredOutputForAzureDeployment");