fix: increase mempool walk timeout

Author: jcnelson

stacks-node/src/tests/nakamoto_integrations.rs

@@ -11671,6 +11671,7 @@ fn large_mempool_base(strategy: MemPoolWalkStrategy, set_fee: impl Fn() -> u64)
 
     let (mut naka_conf, _miner_account) = naka_neon_integration_conf(None);
     naka_conf.miner.mempool_walk_strategy = strategy;
+    naka_conf.miner.nakamoto_attempt_time_ms = 10_000;
 
     let sender_signer_sk = Secp256k1PrivateKey::random();
     let sender_signer_addr = tests::to_addr(&sender_signer_sk);