Instructions for MAUI android app don't work

### 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
Followed the instructions on the readme multiple times for a MAUI app.
[1-Authentication/2-sign-in-maui/README.md](https://github.com/Azure-Samples/ms-identity-ciam-dotnet-tutorial/blob/main/1-Authentication/2-sign-in-maui/README.md)

### Any log messages given by the failure
invalid_request: The provided value for the input parameter 'redirect_uri' is not valid. The expected value is a URI which matches a redirect URI registered for this client application.

### Expected/desired behavior
Logs in and shows the token information screen.

### OS and Version?
Google Pixel 8 (Android 15.0 - API 35)

### Versions
NA

### Mention any other details that might be useful
MainActivity
PlatformConfig.Instance.RedirectUri = $"msal{PublicClientSingleton.Instance.MSALClientHelper.AzureAdConfig.ClientId}://auth";

I have verified this matches what's in Microsoft Azure -> Home -> Azure AD B2C | App registrations -> My app