Fix azureChat issue with APIVersion, Endpoint and Deployment arguments

APIVersion, Endpoint and Deployment arguments did not cast char arrays to strings. Fixed that so char arrays strings are accepted as inputs of these arguments.

Author: vpapanasta

azureChat.m

@@ -103,11 +103,11 @@
         function this = azureChat(systemPrompt, nvp)
             arguments
                 systemPrompt                       {llms.utils.mustBeTextOrEmpty} = []
-                nvp.Endpoint                       {mustBeNonzeroLengthTextScalar}
-                nvp.Deployment                     {mustBeNonzeroLengthTextScalar}
+                nvp.Endpoint                 (1,1) string {mustBeNonzeroLengthTextScalar}
+                nvp.Deployment               (1,1) string {mustBeNonzeroLengthTextScalar}
                 nvp.APIKey                         {mustBeNonzeroLengthTextScalar}
                 nvp.Tools                    (1,:) {mustBeA(nvp.Tools, "openAIFunction")} = openAIFunction.empty
-                nvp.APIVersion               (1,1) {mustBeAPIVersion} = "2024-02-01"
+                nvp.APIVersion               (1,1) string {mustBeAPIVersion} = "2024-02-01"
                 nvp.Temperature                    {llms.utils.mustBeValidTemperature} = 1
                 nvp.TopP                           {llms.utils.mustBeValidTopP} = 1
                 nvp.StopSequences                  {llms.utils.mustBeValidStop} = {}

tests/tazureChat.m

@@ -157,7 +157,7 @@ function canUseAPIVersions(testCase, APIVersions)
             % azureChat.generate
 
             testCase.assumeTrue(isenv("AZURE_OPENAI_API_KEY"),"end-to-end test requires environment variables AZURE_OPENAI_API_KEY, AZURE_OPENAI_ENDPOINT, and AZURE_OPENAI_DEPLOYMENT.");
-            chat = azureChat("APIVersion", string(APIVersions));
+            chat = azureChat("APIVersion", APIVersions);
 
             response = testCase.verifyWarningFree(@() generate(chat,"How similar is the DNA of a cat and a tiger?"));
             testCase.verifyClass(response,'string');