fix(ci): use upstream paritytech/zombienet Docker image

Zombienet is a 3rd-party upstream tool — its Docker image should
reference paritytech/zombienet, not pezkuwi/zombienet which doesn't
exist on Docker Hub. This fixes all zombienet test failures caused
by image pull failures.

.github/actions/build-push-image/action.yml

@@ -27,7 +27,7 @@ runs:
     - name: build
       shell: bash
       env:
-        ZOMBIENET_IMAGE: "docker.io/pezkuwi/zombienet:v1.3.105"
+        ZOMBIENET_IMAGE: "docker.io/paritytech/zombienet:v1.3.105"
         IMAGE_TAG: docker.io/pezkuwi/${{ inputs.image-name }}
       run: |
         export DOCKER_IMAGES_VERSION=${{ github.event.pull_request.head.sha || 'main' }}

.github/zombienet-env

@@ -1,11 +1,11 @@
 # zombienet settings
 ZOMBIENET_PROVIDER=native
-ZOMBIENET_IMAGE_FOR_NATIVE=docker.io/pezkuwi/zombienet:v1.3.133
+ZOMBIENET_IMAGE_FOR_NATIVE=docker.io/paritytech/zombienet:v1.3.133
 ZOMBIENET_DEFAULT_RUNNER_FOR_NATIVE=pezkuwi-runner
 ZOMBIENET_LARGE_RUNNER_FOR_NATIVE=pezkuwi-runner
 ZOMBIENET_DEFAULT_RUNNER_FOR_NATIVE_PERSISTENT=pezkuwi-runner
 ZOMBIENET_LARGE_RUNNER_FOR_NATIVE_PERSISTENT=pezkuwi-runner
-ZOMBIENET_IMAGE_FOR_K8S=docker.io/pezkuwi/zombienet:v1.3.133
+ZOMBIENET_IMAGE_FOR_K8S=docker.io/paritytech/zombienet:v1.3.133
 ZOMBIENET_RUNNER_FOR_K8S=pezkuwi-runner
 DEBUG=zombie,zombie::network-node,zombie::kube::client::logs
 
@@ -16,7 +16,7 @@ ZOMBIENET_SDK_DEFAULT_RUNNER_FOR_NATIVE=pezkuwi-runner
 ZOMBIENET_SDK_LARGE_RUNNER_FOR_NATIVE=pezkuwi-runner
 ZOMBIENET_SDK_DEFAULT_RUNNER_FOR_NATIVE_PERSISTENT=pezkuwi-runner
 ZOMBIENET_SDK_LARGE_RUNNER_FOR_NATIVE_PERSISTENT=pezkuwi-runner
-ZOMBIENET_SDK_IMAGE_FOR_K8S=docker.io/pezkuwi/zombienet:v1.3.133
+ZOMBIENET_SDK_IMAGE_FOR_K8S=docker.io/paritytech/zombienet:v1.3.133
 ZOMBIENET_SDK_RUNNER_FOR_K8S=pezkuwi-runner
 RUST_LOG=info,zombienet_orchestrator=trace,cumulus_zombienet_sdk_helpers=debug