ci(deps): update dependency docker/buildx to v0.12.1 (#555)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [docker/buildx](https://togithub.com/docker/buildx) | patch |
`v0.12.0` -> `v0.12.1` |

---

### Release Notes

<details>
<summary>docker/buildx (docker/buildx)</summary>

### [`v0.12.1`](https://togithub.com/docker/buildx/releases/tag/v0.12.1)

[Compare
Source](https://togithub.com/docker/buildx/compare/v0.12.0...v0.12.1)

Welcome to the v0.12.1 release of buildx!

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

##### Changes

- Fix incorrect validation of some driver-opt values that could cause
invalid state to be stored
[#&#8203;2176](https://togithub.com/docker/buildx/issues/2176)

Previous release can be found at
[v0.12.0](https://togithub.com/docker/buildx/releases/tag/v0.12.0)

</details>

---

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.github/workflows/docker-publish.yml

@@ -21,7 +21,7 @@ env:
   BINARY_NAME: ${{ github.event.repository.name }}
 
   # renovate: datasource=github-releases depName=docker/buildx
-  BUILDX_VERSION: v0.12.0
+  BUILDX_VERSION: v0.12.1
 
 jobs:
   build: