fix AddTableStorageService

Related to: #300

Author: sikutisa

src/AzureOpenAIProxy.ApiApp/Extensions/ServiceCollectionExtensions.cs

@@ -148,7 +148,7 @@ public static IServiceCollection AddTableStorageService(this IServiceCollection
             var configuration = sp.GetService<IConfiguration>()
                 ?? throw new InvalidOperationException($"{nameof(IConfiguration)} service is not registerd.");
 
-            var settings = configuration.GetSection(StorageAccountSettings.Name).Get<StorageAccountSettings>()
+            var settings = configuration.GetSection(AzureSettings.Name).GetSection(StorageAccountSettings.Name).Get<StorageAccountSettings>()
                 ?? throw new InvalidOperationException($"{nameof(StorageAccountSettings)} could not be retrieved from the configuration.");
 
             if (string.IsNullOrWhiteSpace(settings.KeyVaultSecretName) == true)