Work around a strange codegen issue to fix local sim in CI; Bump LibP2P

beacon_chain/nimbus_beacon_node.nim

@@ -1200,7 +1200,8 @@ programMain:
     config.runtimePreset = metadata.runtimePreset
 
     if config.cmd == noCommand:
-      config.bootstrapNodes.add metadata.bootstrapNodes
+      for node in mainnetMetadata.bootstrapNodes:
+        config.bootstrapNodes.add node
 
       if metadata.genesisData.len > 0:
         genesisStateContents = newClone metadata.genesisData
@@ -1226,6 +1227,7 @@ programMain:
   else:
     config.runtimePreset = defaultRuntimePreset
     when const_preset == "mainnet":
+      if config.cmd == noCommand:
         # TODO Remove the ability to override the depositContractAddress
         #      on the command line in favour of always requiring a custom
         #      nework file. We have to do this, because any user setting
@@ -1236,7 +1238,9 @@ programMain:
         config.depositContractDeployedAt =
           some mainnetMetadata.depositContractDeployedAt
 
-      config.bootstrapNodes.add mainnetMetadata.bootstrapNodes
+        for node in mainnetMetadata.bootstrapNodes:
+          config.bootstrapNodes.add node
+
         genesisStateContents = newClone mainnetMetadata.genesisData
         genesisDepositsSnapshotContents = newClone mainnetMetadata.genesisDepositsSnapshot
         eth1Network = some mainnet
@@ -1515,3 +1519,4 @@ programMain:
 
     of RecordCmd.print:
       echo $config.recordPrint
+

vendor/nim-libp2p

@@ -1 +1 @@
-Subproject commit 5c2a54bdd9fc4f9279cba41d2ca5635842ee9446
+Subproject commit b4738d723ceefa3007c7d8f16d17755a661ee50b