Fix kustomize patch: remove namespace for proper matching

Kustomize matches patches before namespace transformation, so the
patch file shouldn't specify namespace (kustomization.yaml adds it).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

argocd/manifests/argocd/argocd-ssh-known-hosts-cm.yaml

@@ -4,7 +4,6 @@ apiVersion: v1
 kind: ConfigMap
 metadata:
   name: argocd-ssh-known-hosts-cm
-  namespace: argocd
 data:
   ssh_known_hosts: |
     # Upstream ArgoCD defaults

argocd/manifests/argocd/kustomization.yaml

@@ -6,7 +6,7 @@ namespace: argocd
 resources:
   - https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
   - service-tailscale.yaml
-  - argocd-ssh-known-hosts-cm.yaml
 
-patchesStrategicMerge:
-  - argocd-cmd-params-cm.yaml
+patches:
+  - path: argocd-cmd-params-cm.yaml
+  - path: argocd-ssh-known-hosts-cm.yaml