deps: update module github.com/moby/buildkit to v0.20.1 (#897)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [github.com/moby/buildkit](https://redirect.github.com/moby/buildkit)
| `v0.20.0` -> `v0.20.1` |
[![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fmoby%2fbuildkit/v0.20.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/go/github.com%2fmoby%2fbuildkit/v0.20.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/go/github.com%2fmoby%2fbuildkit/v0.20.0/v0.20.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fmoby%2fbuildkit/v0.20.0/v0.20.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>moby/buildkit (github.com/moby/buildkit)</summary>

###
[`v0.20.1`](https://redirect.github.com/moby/buildkit/releases/tag/v0.20.1)

[Compare
Source](https://redirect.github.com/moby/buildkit/compare/v0.20.0...v0.20.1)

Welcome to the v0.20.1 release of buildkit!

Please try out the release binaries and report any issues at
https://github.com/moby/buildkit/issues.

##### Contributors

-   Tõnis Tiigi
-   Akihiro Suda
-   CrazyMax

##### Notable Changes

- Fix panic during CDI manager initialization.
[#&#8203;5769](https://redirect.github.com/moby/buildkit/issues/5769)
[cncf-tags/container-device-interface#254](https://redirect.github.com/cncf-tags/container-device-interface/issues/254)
- Fix gRPC message size when writing SBOMs.
[#&#8203;5798](https://redirect.github.com/moby/buildkit/issues/5798)
[containerd/containerd#11457](https://redirect.github.com/containerd/containerd/issues/11457)
- Update azblob client retries for GitHub Actions cache backend.
[#&#8203;5797](https://redirect.github.com/moby/buildkit/issues/5797)
[tonistiigi/go-actions-cache#33](https://redirect.github.com/tonistiigi/go-actions-cache/issues/33)
- Embedded binfmt emulators in the release image have been updated to
QEMU v9.2.2.
[#&#8203;5808](https://redirect.github.com/moby/buildkit/issues/5808)
- Update documentation and examples for rootless mode.
[#&#8203;5765](https://redirect.github.com/moby/buildkit/issues/5765)

##### Dependency Changes

-   **github.com/containerd/containerd/v2**      v2.0.2 -> v2.0.3
- **github.com/tonistiigi/go-actions-cache**
[`1a5174a`](https://redirect.github.com/moby/buildkit/commit/1a5174abd055)
->
[`3e9a664`](https://redirect.github.com/moby/buildkit/commit/3e9a6642607f)
-   **tags.cncf.io/container-device-interface**  v0.8.0 -> v0.8.1

Previous release can be found at
[v0.20.0](https://redirect.github.com/moby/buildkit/releases/tag/v0.20.0)

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

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

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/hetznercloud/csi-driver).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xODUuNCIsInVwZGF0ZWRJblZlciI6IjM5LjE4NS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/hashicorp/nomad/api v0.0.0-20250228163133-786795781185
 	github.com/hetznercloud/hcloud-go/v2 v2.19.1
 	github.com/kubernetes-csi/csi-test/v5 v5.3.1
-	github.com/moby/buildkit v0.20.0
+	github.com/moby/buildkit v0.20.1
 	github.com/prometheus/client_golang v1.21.1
 	github.com/stretchr/testify v1.10.0
 	golang.org/x/sys v0.30.0

go.sum

@@ -128,6 +128,8 @@ github.com/moby/buildkit v0.19.0 h1:w9G1p7sArvCGNkpWstAqJfRQTXBKukMyMK1bsah1HNo=
 github.com/moby/buildkit v0.19.0/go.mod h1:WiHBFTgWV8eB1AmPxIWsAlKjUACAwm3X/14xOV4VWew=
 github.com/moby/buildkit v0.20.0 h1:aF5RujjQ310Pn6SLL/wQYIrSsPXy0sQ5KvWifwq1h8Y=
 github.com/moby/buildkit v0.20.0/go.mod h1:HYFUIK+iGDRxRgdphZ9Nv0y1Fz7mv0HrU7xZoXx217E=
+github.com/moby/buildkit v0.20.1 h1:sT0ZXhhNo5rVbMcYfgttma3TdUHfO5JjFA0UAL8p9fY=
+github.com/moby/buildkit v0.20.1/go.mod h1:Rq9nB/fJImdk6QeM0niKtOHJqwKeYMrK847hTTDVuA4=
 github.com/moby/sys/mountinfo v0.7.2 h1:1shs6aH5s4o5H2zQLn796ADW1wMrIwHsyJ2v9KouLrg=
 github.com/moby/sys/mountinfo v0.7.2/go.mod h1:1YOa8w8Ih7uW0wALDUgT1dTTSBrZ+HiBLGws92L2RU4=
 github.com/moby/sys/userns v0.1.0 h1:tVLXkFOxVu9A64/yh59slHVv9ahO9UIev4JZusOLG/g=