fix linter warnings

Author: rekby

examples/topic/topicreader/topicreader_simple.go

@@ -5,10 +5,9 @@ import (
 	"fmt"
 	"io"
 
-	firestore "google.golang.org/genproto/firestore/bundle"
-
 	"github.com/ydb-platform/ydb-go-sdk/v3/topic/topicreader"
 	"github.com/ydb-platform/ydb-go-sdk/v3/topic/topicsugar"
+	firestore "google.golang.org/genproto/firestore/bundle"
 )
 
 // PrintMessageContent is simple example for easy start read messages