chore(deps): bump git2 from 0.20.3 to 0.20.4

[dependabot]

Bumps git2 from 0.20.3 to 0.20.4.

Changelog

Sourced from git2's changelog.

0.20.4 - 2026-02-02

0.20.3...0.20.4

Fixed

• Fix undefined behavior when dereferencing empty Buf. #1213

Commits

• 8852d7d Merge pull request #1214 from weihanglo/backport-from-raw-parts
• 0b274f7 Bump to 0.20.4
• 73a5d5d Add test for dereference of an empty Buf
• ce56683 fix: check ptr nullity before calling from_raw_parts
• See full diff in compare view

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