Skip adding transaction marker for fleet metadata updates (#25542)

Author: thll

graylog2-server/src/main/java/org/graylog/collectors/FleetService.java

@@ -125,7 +125,6 @@ public Optional<FleetDTO> update(String fleetId, String name, @Nullable String d
                     .updatedAt(Instant.now())
                     .build();
             collection.replaceOne(idEq(fleetId), updated);
-            txnLogService.appendFleetMarker(fleetId, MarkerType.CONFIG_CHANGED);
             return updated;
         });
     }