Clarify the purpose of MaxSimultaneousTransfers config

Clarify the documentation of `MaxSimultaneousTransfers` to state that
the "transfer" refers to multihash syncing only and not the data itself.

node/config/doc_gen.go

@@ -378,8 +378,7 @@ Format: multiaddress`,
 			Name: "MaxSimultaneousTransfers",
 			Type: "uint64",
 
-			Comment: `The maximum number of simultaneous data transfers between the indexers
-and the indexer provider`,
+			Comment: `The maximum number of simultaneous requests syncing the list of advertised multihashes between the indexers and the index provider.`,
 		},
 	},
 	"Libp2p": []DocField{

node/config/types.go

@@ -173,8 +173,8 @@ type IndexerProviderConfig struct {
 	// Format: multiaddress
 	AnnounceAddresses []string
 
-	// The maximum number of simultaneous data transfers between the indexers
-	// and the indexer provider
+	// The maximum number of simultaneous requests syncing the list of advertised multihashes
+	// between the indexers and the index provider.
 	MaxSimultaneousTransfers uint64
 }