Merge pull request #6539 from ethereum-optimism/aj/enable-peer-scoring

op-node: Enable peer scoring by default.

op-node/flags/p2p_flags.go

@@ -30,6 +30,7 @@ var (
 		Name:     "p2p.scoring",
 		Usage:    "Sets the peer scoring strategy for the P2P stack. Can be one of: none or light.",
 		Required: false,
+		Value:    "light",
 		EnvVars:  p2pEnv("PEER_SCORING"),
 	}
 	PeerScoring = &cli.StringFlag{