Add unique key prop to React.Fragment in Home component

[wadadaaa]

This PR addresses a warning caused by missing unique key props for elements rendered in a list using the map function in the Home component. Specifically, it adds key props to the outermost elements (React.Fragment) within the map functions for chatMessages and sourceDocs.

Changes:

• Added unique key props to React.Fragment elements in the map functions of chatMessages and sourceDocs in the Home component (pages/index.tsx).
• Updated pnpm-lock.yaml file.

These changes resolve the warning and ensure efficient re-rendering of components when the data changes.

Please let me know if you have any questions or need further modifications. I'll be happy to address them.