feat: use worst case member # 6551 of G1 WoT

pallets/certification/src/benchmarking.rs

@@ -86,7 +86,7 @@ benchmarks_instance_pallet! {
         assert!(CertsByReceiver::<T, I>::get(receiver).len() == 0 );
     }
     compute_distance_bench {
-        let i in 1..12533;
+        let i = 6551;
     }: {
         Pallet::<T, I>::compute_distance(RawOrigin::Root.into(), (i as u32).into());
     }