feat: Update VM image to Canonical's latest Ubuntu 22.04 LTS for AKS deployment

Author: emmanuelknafo

.github/workflows/deploy-private-aks.yml

@@ -176,7 +176,7 @@ jobs:
           az vm create \
             --resource-group "$INFRA_RG" \
             --name "$RUNNER_VM" \
-            --image Ubuntu2204 \
+            --image Canonical:0001-com-ubuntu-server-jammy:22_04-lts-gen2:latest \
             --size Standard_B2s \
             --admin-username azureuser \
             --generate-ssh-keys \