p2p/discover: fix typo in comments (#21554)

p2p/discover/table.go

@@ -377,7 +377,7 @@ func (tab *Table) nextRevalidateTime() time.Duration {
 }
 
 // copyLiveNodes adds nodes from the table to the database if they have been in the table
-// longer then minTableTime.
+// longer than seedMinTableTime.
 func (tab *Table) copyLiveNodes() {
 	tab.mutex.Lock()
 	defer tab.mutex.Unlock()