Update client README - close client resources

client/README.md

@@ -72,7 +72,8 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-
+	defer c.Close()
+	
 	// Create a new point batch
 	bp, err := client.NewBatchPoints(client.BatchPointsConfig{
 		Database:  MyDB,
@@ -100,6 +101,11 @@ func main() {
 	if err := c.Write(bp); err != nil {
 		log.Fatal(err)
 	}
+	
+	// Close client resources
+	if err := c.Close(); err != nil {
+    		log.Fatal(err)
+	}
 }
 
 ```