Update docker/build-push-action digest to ee4ca42

Author: renovate[bot]

.github/workflows/ci.yml

@@ -101,7 +101,7 @@ jobs:
       # the build, per https://docs.docker.com/build/cache/backends/gha/.
       - name: Build Runtime
         id: image
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6
+        uses: docker/build-push-action@ee4ca427a2f43b6a16632044ca514c076267da23 # v6
         with:
           context: .
           platforms: linux/${{ matrix.arch }}