refactor: replace deprecated grpc.Dial with grpc.NewClient in code and docs

examples/grpcentity/client.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"grpccanary/examples/grpcentity/protoapi"
 	"math/rand"
-	"time"
 
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
@@ -39,9 +38,9 @@ func AskUpdateSensingData(ctx context.Context, m protoapi.IoTServiceClient, devi
 }
 
 func ClientRun(addr string) {
-	conn, err := grpc.Dial(addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	conn, err := grpc.NewClient(addr, grpc.WithTransportCredentials(insecure.NewCredentials()))
 	if err != nil {
-		fmt.Println("Dial:", err)
+		fmt.Println("NewClient error:", err)
 		return
 	}
 
@@ -53,7 +52,6 @@ func ClientRun(addr string) {
 	}
 	fmt.Println("Server Date and Time:", r.Value)
 
-	rand.Seed(time.Now().Unix())
 	length := int64(rand.Intn(20))
 	p, err := AskPass(context.Background(), client, 100, length+1)
 	if err != nil {