ci: restore ubi8-init-dind build step in release workflow

Co-authored-by: JeffreyDallas <39912573+JeffreyDallas@users.noreply.github.com>
Signed-off-by: Jeffrey Tang <jeffrey@swirldslabs.com>

Author: Copilot

.github/workflows/flow-deploy-release-artifact.yaml

@@ -117,6 +117,14 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
 
+      - name: Build Docker Image (ubi8-init-dind)
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
+        with:
+          context: docker/ubi8-init-dind
+          platforms: linux/amd64, linux/arm64
+          push: ${{ github.event.inputs.dry-run-enabled != 'true' }}
+          tags: ghcr.io/${{ github.repository }}/ubi8-init-dind:${{ needs.prepare-release.outputs.version }}
+
       - name: Build Docker Image (ubi8-s6-java21)
         uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
         with: