chore: update Intercom SDK dependencies (iOS: 19.5.2 → 19.5.3, Android: 17.4.5 → 17.4.6)

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🔄 Automated Intercom SDK Dependency Update

This PR updates the Intercom SDK dependencies to their latest versions.

📋 Changes Made:

• Updated iOS SDK from 19.5.2 to 19.5.3
• Updated Android SDK from 17.4.5 to 17.4.6
• Bumped version from 9.6.3 to 9.6.4 (patch)

📚 Release Notes:

📱 iOS SDK 19.5.3

View Release Notes

###### Release Date: 05-03-2026

### 🐛 Bug Fixes
* Fixed an issue where CSAT workflow reply buttons could fail to render on closed conversations.
* Fixed an issue where calling logout() while viewing a modally presented screen could leave the Messenger home screen visible behind it.
* Fixed an issue where push notifications could be processed after the user had logged out.
* Fixed an issue where in-app notifications may not display the branded AI agent identity.

🤖 Android SDK 17.4.6

View Release Notes

###### Release Date: 03-03-2026

### 🐛 Bug Fixes
* Fixed a crash that could occur when handling push notifications
* Fixed push notification images not loading correctly in some cases
* Fixed AI agent name and avatar not appearing correctly in in-app notifications

### 👉 Note
* The next major version of the Android SDK will require `minSdk 23` (Android 6.0) due to AndroidX Compose library requirements.

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🤖 This PR was automatically created by the Update Dependencies workflow.