doc: update 'sync_bytes' in peer status

Fixes: https://tracker.ceph.com/issues/65629
Signed-off-by: Jos Collin <[email protected]>

Author: joscollin

doc/cephfs/cephfs-mirroring.rst

@@ -341,7 +341,8 @@ command is of format `filesystem-name@filesystem-id peer-uuid`::
             "id": 120,
             "name": "snap1",
             "sync_duration": 0.079997898999999997,
-            "sync_time_stamp": "274900.558797s"
+            "sync_time_stamp": "274900.558797s",
+            "sync_bytes": 52428800
         },
         "snaps_synced": 2,
         "snaps_deleted": 0,
@@ -374,7 +375,8 @@ When a directory is currently being synchronized, the mirror daemon marks it as
             "id": 120,
             "name": "snap1",
             "sync_duration": 0.079997898999999997,
-            "sync_time_stamp": "274900.558797s"
+            "sync_time_stamp": "274900.558797s",
+            "sync_bytes": 52428800
         },
         "snaps_synced": 2,
         "snaps_deleted": 0,
@@ -402,7 +404,8 @@ E.g., adding a regular file for synchronization would result in failed status::
             "id": 121,
             "name": "snap2",
             "sync_duration": 300,
-            "sync_time_stamp": "500900.600797s"
+            "sync_time_stamp": "500900.600797s",
+            "sync_bytes": 78643200
         },
         "snaps_synced": 3,
         "snaps_deleted": 0,