fix(actions): add argocd login step

.forgejo/workflows/validate.yaml

@@ -53,6 +53,14 @@ jobs:
         run: |
           kubectl apply -f apps/
 
+      - name: Login to ArgoCD
+        run: |
+          argocd login argocd-server.argocd.svc.cluster.local \
+            --plaintext \
+            --grpc-web \
+            --username admin \
+            --password $(kubectl get secret argocd-initial-admin-secret -n argocd -o jsonpath="{.data.password}" | base64 -d)
+
       - name: Wait for ArgoCD sync
         run: |
           APPS=$(argocd app list -o name)