chore(deps): bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#153)

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 3.11.1 to 3.12.0.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@e468171...8d2750c)

---
updated-dependencies:
- dependency-name: docker/setup-buildx-action
  dependency-version: 3.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-package.yml

@@ -51,7 +51,7 @@ jobs:
 
       - name: Set up Docker Buildx
         if: github.repository_owner == 'microcks' && env.PACKAGE_IMAGE == 'true'
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
       - name: Login to Quay.io and Docker Hub registries and setup multi-arch builder
         if: github.repository_owner == 'microcks' && env.PACKAGE_IMAGE == 'true'