Custom Cert Authentication not working with SWA deploy

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- [ ] No, I am using a different port number (`--port`) and accessing the CLI from that port
- [x] Yes, I am accessing the CLI from port `:4280`

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**ℹ️ NOTE: Make sure to enable debug logs when running any `swa` commands using `--verbose=silly`**

**Describe the bug**
On the Static Web App documentation there is a sample using cert-based authentication:


[Custom authentication in Azure Static Web Apps | Microsoft Learn](https://learn.microsoft.com/en-us/azure/static-web-apps/authentication-custom?tabs=aad%2Cinvitations)

It uses the clientSecretCertificateKeyVaultReference property. But when I run swa deploy I am getting errors saying that is invalid:


**To Reproduce**
Steps to reproduce the behavior:

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2. Type in command 'swa ...'
3. Click on '...'
4. Scroll down to '...'
5. See error

**Expected behavior**
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**Desktop (please complete the following information):**

- OS: [e.g. iOS]
- Version [e.g. 22]

**Additional context**
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Inizia riproducendo il problema con `swa deploy` e `--verbose=silly`, dopo aver verificato la versione della CLI con `swa --version`. Confronta la gestione di `clientSecretCertificateKeyVaultReference` con la documentazione collegata di Azure Static Web Apps; il lavoro è completato quando la configurazione basata su certificato documentata viene accettata senza l’errore segnalato relativo a una proprietà non valida.

Scritto dal modello di indicizzazione a partire dal testo della issue.