[b/r] Default OADP channel to stable for OCP 4.20

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: stuggi

docs/dev/backup-restore/oadp/setup-oadp.yaml

@@ -17,7 +17,7 @@
   gather_facts: false
   vars:
     oadp_namespace: "openshift-adp"
-    oadp_channel: "stable-1.4"
+    oadp_channel: "stable"
     minio_namespace: "minio"
     minio_bucket_name: "velero"
     minio_region: "minio"

docs/dev/backup-restore/role/cifmw_backup_restore/defaults/main.yml

@@ -55,7 +55,7 @@ cifmw_backup_restore_minio_root_password: minio123
 cifmw_backup_restore_minio_bucket_name: velero
 
 # OADP Setup
-cifmw_backup_restore_oadp_channel: stable-1.4
+cifmw_backup_restore_oadp_channel: stable
 cifmw_backup_restore_oadp_enable_node_agent: true
 # cifmw_backup_restore_minio_access_key_id: REQUIRED for setup_oadp
 # cifmw_backup_restore_minio_secret_access_key: REQUIRED for setup_oadp