Bump docker/setup-buildx-action from 2 to 3

Bumps [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) from 2 to 3.
- [Release notes](https://github.com/docker/setup-buildx-action/releases)
- [Commits](docker/setup-buildx-action@v2...v3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v4
-      - uses: docker/setup-buildx-action@v2
+      - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v2
         with:
           username: ${{ github.actor }}
@@ -98,7 +98,7 @@ jobs:
         with:
           path: ./rubies
           key: ${{ matrix.entry.rubies_cache_key }}
-      - uses: docker/setup-buildx-action@v2
+      - uses: docker/setup-buildx-action@v3
       - uses: docker/build-push-action@v4
         id: builder-image
         with: