Bump github.com/ipfs/go-unixfs from 0.4.0 to 0.4.3

[dependabot[bot]]

Bumps github.com/ipfs/go-unixfs from 0.4.0 to 0.4.3.

Release notes

Sourced from github.com/ipfs/go-unixfs's releases.

v0.4.3

What's Changed

• sync: update CI config files by @​web3-bot in ipfs/go-unixfs#137

Full Changelog: https://github.com/ipfs/go-unixfs/compare/v0.4.2...v0.4.3

v0.4.1

What's Changed

• Fix: panic when childer is nil by @​ajnavarro in ipfs/go-unixfs#127

Full Changelog: https://github.com/ipfs/go-unixfs/compare/v0.4.0...v0.4.1

Commits

• 467d139 Merge pull request from GHSA-q264-w97q-q778
• 1e875f4 chore: release v0.4.3
• dbcc43e fix: correctly handle degenerate hamts while reading data
• 6609090 sync: update CI config files (#137)
• 323bb63 chore: version 0.4.2 (#136)
• a76f0e5 chore: migrate files (#134)
• 707110f Merge pull request #128 from ipfs/ajnavarro-patch-1
• 5a97ef6 Update version.json
• fede2ed Fix: panic when childer is nil (#127)
• 2c23c3e sync: update CI config files (#125)
• Additional commits viewable in compare view

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[hsanjuan]

@dependabot rebase

[dependabot[bot]]

Looks like github.com/ipfs/go-unixfs is no longer a dependency, so this is no longer needed.