fix: update filesize package import to resolve build warning

[milad-emami]

This PR fixes the build warning introduced by Renovate PR #241 which updates filesize to v10.

The warning was:

WARNING in ./src/components/FilePopoverContent/index.jsx 34:66-74
export 'default' (imported as 'filesize') was not found in 'filesize' (possible exports: filesize, partial)

[openedx-webhooks]

Thanks for the pull request, @milad-emami!

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