Update description of COATxLookupEnabled config flag

Author: m-Peter

config/config.go

@@ -56,9 +56,9 @@ type Config struct {
 	COAKey crypto.PrivateKey
 	// COACloudKMSKey is a Cloud KMS key that will be used for signing transactions.
 	COACloudKMSKey *flowGoKMS.Key
-	// COATxLookupEnabled sets whether COA signing keys are released by looking up
-	// their transaction result status from ANs. Increases capacity of the available
-	// COA signing keys.
+	// COATxLookupEnabled enables tracking of Cadence transactions to release COA signing
+	// keys much faster. Increases capacity of the available COA signing keys for nodes
+	// with high tx volume.
 	COATxLookupEnabled bool
 	// GasPrice is a fixed gas price that will be used when submitting transactions.
 	GasPrice *big.Int