Failed to find the placed holder mentioned iOS AppDelegate.cs file

> Please provide us with the following information:
> ---------------------------------------------------------------

### This issue is for a: (mark with an `x`)
```
- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [X ] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
>Refer to https://github.com/Azure-Samples/ms-identity-ciam-dotnet-tutorial/tree/main/1-Authentication/2-sign-in-maui#:~:text=Open%20the%20Platforms%5CiOS,from%20the%20Azure%20portal.
A reference is made to the placeholder in the iOS AppDelegate.cs file. I do not see that placeholder.
### Any log messages given by the failure
>

### Expected/desired behavior
>
Adjust the AppDelegate.cs file to include the placeholder or adjust the step in the documentation.
### OS and Version?
> Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)
iOS
### Versions
>

### Mention any other details that might be useful

> ---------------------------------------------------------------
> Thanks! We'll be in touch soon.