flaky test(gossipsub): DecayInterval

[vladopajic]

https://github.com/vacp2p/nim-libp2p/actions/runs/25120814087/job/73620907737?pr=2367

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  D:\a\nim-libp2p\nim-libp2p\tests\test_all.exe "GossipSub Component - Scoring::DecayInterval"
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    D:\a\nim-libp2p\nim-libp2p\tests\libp2p\pubsub\component\test_gossipsub_scoring.nim(384, 91): Check failed: nodes[0].peerStats[nodes[1].peerInfo.peerId].topicInfos[topic].meshMessageDeliveries in
    50.0 .. 66.0