Bump docker/setup-qemu-action from 3 to 4

Bumps [docker/setup-qemu-action](https://github.com/docker/setup-qemu-action) from 3 to 4.
- [Release notes](https://github.com/docker/setup-qemu-action/releases)
- [Commits](https://github.com/docker/setup-qemu-action/compare/v3...v4)

---
updated-dependencies:
- dependency-name: docker/setup-qemu-action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/pr-containers.yml

@@ -19,7 +19,7 @@ jobs:
 
     - name: Set up QEMU
       id: qemu
-      uses: docker/setup-qemu-action@v3
+      uses: docker/setup-qemu-action@v4
       with:
         platforms: all
 

.github/workflows/push.yml

@@ -29,7 +29,7 @@ jobs:
 
       - name: Set up QEMU
         id: qemu
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v4
         with:
           platforms: all
       - name: Set up Docker Buildx