chore(deps): bump docker/setup-buildx-action from 3.12.0 to 4.0.0 (#10556)

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

.github/workflows/mcp-container-checks.yml

@@ -105,7 +105,7 @@ jobs:
 
       - name: Set up Docker Buildx
         if: steps.check-changes.outputs.any_changed == 'true'
-        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
 
       - name: Build MCP container for ${{ matrix.arch }}
         if: steps.check-changes.outputs.any_changed == 'true'