remove alpha
alpha is no longer present in the docs:
@@ -43,7 +43,7 @@ Choose unauthenticated access if you don't need auth.
To obtain the trigger URL do the following:
```bash
-$ YOUR_HTTP_TRIGGER_URL=$(gcloud alpha functions describe @project.getName() --format='value(httpsTrigger.url)')
+$ YOUR_HTTP_TRIGGER_URL=$(gcloud functions describe @project.getName() --format='value(httpsTrigger.url)')
```
You can then use this variable to test the function invocation:
