Ensure loadApiError is caught

And add a better error message.

By using `void` instead of `await`, any error thrown is not caught
by surrounding try-catch blocks.

I could continue to use `void` and explicitly handle any thrown errors
by using `.catch`, but most likely the time savings is minimal and
this makes the code more complex.

src/init-action.ts

@@ -143,9 +143,10 @@ async function run() {
     repositoryNwo,
     logger
   );
-  void featureFlags.preloadFeatureFlags();
 
   try {
+    await featureFlags.preloadFeatureFlags();
+
     const workflowErrors = await validateWorkflow();
 
     if (