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

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

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

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

.github/workflows/backend-docker.yml

@@ -18,7 +18,7 @@ jobs:
       uses: actions/checkout@v3
 
     - name: Set up QEMU
-      uses: docker/setup-qemu-action@v2
+      uses: docker/setup-qemu-action@v3
       with:
         platforms: all