Update GroupChannelProvider.tsx

[danney-chun]

// PR title (Required)
[fix]: Fix a bug where autoscrollMessageOverflowToTop set on SendbirdProvider was not being passed down to child components.

// PR description (Optional)
Add a brief description of the changes in this PR. Bullet points are also fine.

// Footer (Recommended)
Fixes CLNP-7892

// Changelogs (Recommended)

Changelogs

• Fix a bug where autoscrollMessageOverflowToTop set on SendbirdProvider was not being passed down to child components

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• All tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
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