Update edge node manifest version to latest (#1808)

Co-authored-by: GitHub Bot <github-bot@intel.com>
Co-authored-by: Andrei Palade <andrei.palade@intel.com>

Author: 3 people

argocd/applications/configs/infra-onboarding.yaml

@@ -60,5 +60,5 @@ dkam:
 
 infra-config:
   config:
-    enAgentManifestTag: "1.6.4"
+    enAgentManifestTag: "1.6.6"
     embImageUrl: files-edge-orch/repository/microvisor/uos/emb_uos_x86_64_20260507.tar.gz