Fixing error message: Pointing to correct value --api-gateway-emulato… (#1966)

Author: wralph

.autover/changes/a1844c2a-731e-4bc8-9f67-99982c6447a8.json

@@ -0,0 +1,11 @@
+{
+  "Projects": [
+  {
+    "Name": "Amazon.Lambda.TestTool",
+    "Type": "Patch",
+    "ChangelogMessages": [
+      "Fix exception method when not setting --api-gateway-emulator-mode"
+    ]
+  }
+ ]
+}

Tools/LambdaTestTool-v2/src/Amazon.Lambda.TestTool/Commands/RunCommand.cs

@@ -65,7 +65,7 @@ public override async Task<int> ExecuteAsync(CommandContext context, RunCommandS
             {
                 if (settings.ApiGatewayEmulatorMode is null)
                 {
-                    throw new ArgumentException("When --api-gateway-emulator-port is set the --api-gateway-mode must be set to configure the mode for the API Gateway emulator.");
+                    throw new ArgumentException("When --api-gateway-emulator-port is set the --api-gateway-emulator-mode must be set to configure the mode for the API Gateway emulator.");
                 }
 
                 var apiGatewayEmulatorProcess =