fix some comments

Signed-off-by: zhaonan <[email protected]>

internal/xds/bootstrap/bootstrap.go

@@ -37,7 +37,7 @@ const (
 	EnvoyReadinessPort    = 19001
 	EnvoyReadinessPath    = "/ready"
 
-	// DefaultEnvoyStatsMatcherPrefixes is the default subset of Envoy stats.
+	// DefaultEnvoyStatsMatcherPrefixes is the default subset of Envoy stats added when setting StatsMatcher.
 	DefaultEnvoyStatsMatcherPrefixes = "cluster_manager,listener_manager,server,cluster.xds-grpc"
 )
 
@@ -66,13 +66,11 @@ type bootstrapParameters struct {
 	EnablePrometheus bool
 	// OtelMetricSinks defines the configuration of the OpenTelemetry sinks.
 	OtelMetricSinks []metricSink
-
-	// StatsMatcher is to control creation of additional Envoy stats with prefix,
-	// suffix, and regex expressions match on the name of the stats.
-	StatsMatcher StatsMatcherParameters
-
 	// EnableStatConfig defines whether to to customize the Envoy proxy stats.
 	EnableStatConfig bool
+	// StatsMatcher is to control creation of custom Envoy stats with prefix,
+	// suffix, and regex expressions match on the name of the stats.
+	StatsMatcher StatsMatcherParameters
 }
 
 type xdsServerParameters struct {