build: Update go-git

[go-git-renovate]

This PR contains the following updates:

Package	Change	Age	Confidence	Type	Update
github.com/go-git/go-billy/v6	v6.0.0-20260226131633-45bd0956d66f → v6.0.0-20260328065524-593ae452e14d			require	patch
github.com/go-git/go-git-fixtures/v5	eda62fa → 487c094			require	digest

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Renovate Bot.

[go-git-renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: go get -t ./...
go: errors parsing go.mod:
go.mod:9:2: require github.com/go-git/go-git-fixtures/v5: version "v5.1.2-0.20260403205623-487c094a2af5" invalid: go.mod has non-.../v5 module path "github.com/go-git/go-git-fixtures/v6" (and .../v5/go.mod does not exist) at revision 487c094a2af5