Bump version to 1.4.2

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jmarbutt

Inngest/InngestClient.cs

@@ -30,7 +30,7 @@ public class InngestClient : IInngestClient
     private readonly string _environment;
     private readonly bool _isDev;
     private readonly bool _disableCronTriggersInDev;
-    private readonly string _sdkVersion = "1.4.1";
+    private readonly string _sdkVersion = "1.4.2";
     private readonly string _appId;
     private readonly ILogger _logger;
     private readonly IInngestFunctionRegistry? _registry;