Update oxide-vpc digest to 871b127

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
oxide-vpc	workspace.dependencies	digest	3d1263c -> 871b127

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This PR has been generated by Renovate Bot.

[oxide-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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --workspace
    Updating crates.io index
    Updating git repository `https://github.com/oxidecomputer/opte`
    Updating crates.io index
error: failed to select a version for `ref-cast`.
    ... required by package `opte v0.1.0 (https://github.com/oxidecomputer/opte?rev=795a1e0aeefb7a2c6fe4139779fdf66930d09b80#795a1e0a)`
    ... which satisfies git dependency `opte` (locked to 0.1.0) of package `opte-ioctl v0.1.0 (https://github.com/oxidecomputer/opte?rev=795a1e0aeefb7a2c6fe4139779fdf66930d09b80#795a1e0a)`
    ... which satisfies git dependency `opte-ioctl` (locked to 0.1.0) of package `illumos-utils v0.1.0 (https://github.com/oxidecomputer/omicron?branch=main#b36f0329)`
    ... which satisfies git dependency `illumos-utils` (locked to 0.1.0) of package `nexus-sled-agent-shared v0.1.0 (https://github.com/oxidecomputer/omicron?branch=main#b36f0329)`
    ... which satisfies git dependency `nexus-sled-agent-shared` (locked to 0.1.0) of package `nexus-client v0.1.0 (https://github.com/oxidecomputer/omicron?branch=main#b36f0329)`
    ... which satisfies git dependency `nexus-client` (locked to 0.1.0) of package `oximeter-producer v0.1.0 (https://github.com/oxidecomputer/omicron?branch=main#b36f0329)`
    ... which satisfies git dependency `oximeter-producer` (locked to 0.1.0) of package `mgd v0.1.0 (/tmp/renovate/repos/github/oxidecomputer/maghemite/mgd)`
versions that meet the requirements `^1.0.24` (locked to 1.0.24) are: 1.0.24

all possible versions conflict with previously selected packages.

  previously selected package `ref-cast v1.0.25`
    ... which satisfies dependency `ref-cast = "^1.0.25"` of package `opte v0.1.0 (https://github.com/oxidecomputer/opte?rev=871b127166f3b5acda17377927a91d8a613cc9ef#871b1271)`
    ... which satisfies git dependency `opte` of package `oxide-vpc v0.1.0 (https://github.com/oxidecomputer/opte?rev=871b127166f3b5acda17377927a91d8a613cc9ef#871b1271)`
    ... which satisfies git dependency `oxide-vpc` of package `ddm v0.1.0 (/tmp/renovate/repos/github/oxidecomputer/maghemite/ddm)`
    ... which satisfies path dependency `ddm` (locked to 0.1.0) of package `ddmadm v0.1.0 (/tmp/renovate/repos/github/oxidecomputer/maghemite/ddmadm)`

failed to select a version for `ref-cast` which could resolve this conflict