refactor: yml -> yaml

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/kubernetes_argocd/templates/root_application.yaml.j2

@@ -0,0 +1,25 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: homelab-gitops-root
+  namespace: argocd
+  labels:
+    app.kubernetes.io/name: argocd-root
+    app.kubernetes.io/instance: homelab
+    app.kubernetes.io/component: gitops-bootstrap
+spec:
+  project: default
+  source:
+    repoURL: {{ argocd_git_repository }}
+    targetRevision: HEAD
+    path: cluster-apps/
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: argocd
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true
+      - ApplyOutOfSyncOnly=true