Update messages_it_IT.properties (#4285)

# Description of Changes

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## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/core/src/main/resources/messages_it_IT.properties

@@ -909,7 +909,7 @@ login.alreadyLoggedIn=Hai già effettuato l'accesso a
 login.alreadyLoggedIn2=dispositivi. Esci dai dispositivi e riprova.
 login.toManySessions=Hai troppe sessioni attive
 login.logoutMessage=Sei stato disconnesso.
-login.invalidInResponseTo=The requested SAML response is invalid or has expired. Please contact the administrator.
+login.invalidInResponseTo=La risposta SAML richiesta non è valida o è scaduta. Contattare l'amministratore.
 
 #auto-redact
 autoRedact.title=Redazione automatica
@@ -1436,7 +1436,7 @@ pdfToImage.colorType=Tipo di colore
 pdfToImage.color=A colori
 pdfToImage.grey=Scala di grigi
 pdfToImage.blackwhite=Bianco e Nero (potresti perdere dettagli!)
-pdfToImage.dpi=DPI (The server limit is {0} dpi)
+pdfToImage.dpi=DPI (Il limite del server è {0} dpi)
 pdfToImage.submit=Converti
 pdfToImage.info=Python non è installato.È richiesto per la conversione WebP.
 pdfToImage.placeholder=(es. 1,2,8 o 4,7,12-16 o 2n-1)