Update docker.io/woodpeckerci/plugin-docker-buildx Docker tag to v2.2.1 (#2883)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[docker.io/woodpeckerci/plugin-docker-buildx](https://codeberg.org/woodpecker-plugins/docker-buildx.git)
| patch | `2.2.0` -> `2.2.1` |

---

### Release Notes

<details>
<summary>woodpecker-plugins/docker-buildx
(docker.io/woodpeckerci/plugin-docker-buildx)</summary>

###
[`v2.2.1`](https://codeberg.org/woodpecker-plugins/docker-buildx/releases/tag/v2.2.1)

[Compare
Source](https://codeberg.org/woodpecker-plugins/docker-buildx/compare/2.2.0...v2.2.1)

##### Fixes

- Add `git` to image
([#&#8203;109](https://togithub.com/woodpecker-plugins/docker-buildx/issues/109))
- Fix separator for tags_file in docs
([#&#8203;107](https://togithub.com/woodpecker-plugins/docker-buildx/issues/107))

##### Dependencies

- chore(deps): update docker/buildx-bin docker tag to v0.12.0
([#&#8203;111](https://togithub.com/woodpecker-plugins/docker-buildx/issues/111))
- chore(docker): update docker:24.0-dind docker digest to
[`1dfc375`](https://togithub.com/woodpecker-plugins/docker-buildx/commit/1dfc375)
([#&#8203;106](https://togithub.com/woodpecker-plugins/docker-buildx/issues/106))

</details>

---

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.woodpecker/docker.yml

@@ -17,7 +17,7 @@ variables:
   - &node_image 'docker.io/node:21-alpine'
   - &xgo_image 'docker.io/techknowlogick/xgo:go-1.21.4'
   - &xgo_version 'go-1.21.2'
-  - &buildx_plugin 'docker.io/woodpeckerci/plugin-docker-buildx:2.2.0'
+  - &buildx_plugin 'docker.io/woodpeckerci/plugin-docker-buildx:2.2.1'
   - &platforms_release 'linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/386,linux/amd64,linux/ppc64le,linux/riscv64,linux/s390x,freebsd/arm64,freebsd/amd64,openbsd/arm64,openbsd/amd64'
   - &platforms_server 'linux/arm/v7,linux/arm64/v8,linux/amd64,linux/ppc64le,linux/riscv64'
   - &platforms_preview 'linux/amd64'