chore(UPM-114946): update only with appliance provider for HM install

Author: neel5481

product_docs/docs/edb-postgres-ai/1.4/hybrid-manager/install/install_guide/install_hm.mdx

@@ -119,7 +119,6 @@ spec:
     logLevel: info
     providers:
       - appliance
-      - k8s
     provisioning:
       imageDiscovery: true
       imagesetDiscoveryAuthenticationType: "basic"