🔑 fix: Update Conversation Mutation to use ID from Payload

[berry-13]

Summary

• 🐛 Bug Fix: Updated useUpdateConversationMutation's onSuccess callback to correctly handle conversationId from payload, ensuring the right conversation ID is used to update query data
• 📦 Version Update: Incremented librechat-data-provider package version from 0.7.902 to 0.7.903

from #8750:

When renaming a conversation, the input field.closes but the conversation doesn't appear renamed.
Reopening the input field shows the old name

Change Type

• Bug fix (non-breaking change which fixes an issue)

Testing

Tested by creating, updating and deleting mutiple conversations

Checklist

• My code adheres to this project's style guidelines
• I have performed a self-review of my own code
• I have commented in any complex areas of my code
• My changes do not introduce new warnings
• Local unit tests pass with my changes
• Any changes dependent on mine have been merged and published in downstream modules.