fix: correct order-service image name typo causing ImagePullBackOff

[github-actions]

Summary

Fixes #40 — ArgoCD agentic-platform-engineering-demo health status Degraded.

Root Cause

A one-character typo in Act-3/argocd/apps/broken-aks-store-all-in-one.yaml caused the order-service Deployment to reference a non-existent container image, triggering ImagePullBackOff and a stuck rolling update.

- image: ghcr.io/azure-samples/aks-store-demo/order-servic:2.1.0
+ image: ghcr.io/azure-samples/aks-store-demo/order-service:2.1.0

The trailing e was missing from order-service.

Evidence Collected

Signal	Observation
Pod order-service-74887bf86-lxmxs	ImagePullBackOff for 2d4h — 13,881 failures
Deployment condition	Progressing: False (ProgressDeadlineExceeded)
Deployment revision	v17 — NewReplicaSet: order-service-74887bf86 (broken)
Cluster	msftgbb / agentic-platform-engineering / AKS 1.33.7, canadacentral
ArgoCD sync status	Synced (repo matches cluster) — but Health: Degraded because deployment is stuck

Cluster State Before Fix

NAME                                READY   STATUS             RESTARTS   AGE
order-service-575df9db99-x6kmq      1/1     Running            0          (old RS, correct image)
order-service-74887bf86-lxmxs       0/1     ImagePullBackOff   0          2d4h

Impact

• The order-service Deployment rolling update was permanently blocked.
• Kubernetes kept the old (working) pod alive, so order processing was not fully interrupted, but the deployment was marked unavailable and ArgoCD health was Degraded.

Fix

Single character correction: order-servic → order-service in the image tag field.

Test Plan

1. Merge this PR.
2. ArgoCD will detect the manifest change and sync the updated Deployment template.
3. Kubernetes will create a new ReplicaSet with the correct image and roll forward.
4. Verify:

   kubectl get pods -n default -l app=order-service
   # Expected: 1/1 Running (new RS), old broken pod terminated
   kubectl get deployment order-service -n default
   # Expected: READY 1/1, UP-TO-DATE 1, AVAILABLE 1

5. ArgoCD app health should return to Healthy.

Rollback

Revert this PR or run:

kubectl rollout undo deployment/order-service -n default