chore: update README.md

Author: muhsin-k

README.md

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 iOS SDK for Chatwoot
 
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@@ -20,7 +20,7 @@ Import in your app:
 import ChatwootSDK
 ```
 
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 ## 📸 Camera and Photo Library Permissions (Required)
 
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    - **NSCameraUsageDescription**: Explains why the app uses the camera (e.g., photo capture for chat).
    - **NSPhotoLibraryUsageDescription**: Explains why the app needs photo library access (e.g., image upload for chat).
 
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 ## ⚙️ Configuration Parameters
 
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 | `pubsubToken`   | `String`  | ✅        | Token for real-time updates                 |
 | `websocketUrl`  | `String`  | ✅        | WebSocket URL for real-time communication   |
 
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 ## 🛠️ Example Usage
 
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 The `conversationId` is required to load the chat UI. Make sure you have a valid conversation ID before calling `loadChatUI`.
 
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