ci: bump docker/setup-buildx-action from 2 to 3 (#6872)

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](https://github.com/docker/setup-buildx-action/compare/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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci-main.yml

@@ -192,7 +192,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: prepare variables
         uses: ./.github/actions/docker-push-variables
         id: ev
@@ -239,7 +239,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: prepare variables
         uses: ./.github/actions/docker-push-variables
         id: ev

.github/workflows/ci-outpost.yml

@@ -70,7 +70,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: prepare variables
         uses: ./.github/actions/docker-push-variables
         id: ev

.github/workflows/release-publish.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: prepare variables
         uses: ./.github/actions/docker-push-variables
         id: ev
@@ -62,7 +62,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3.0.0
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: prepare variables
         uses: ./.github/actions/docker-push-variables
         id: ev