fix: change subject flag to title

service/textmagic/textmagic.go

@@ -48,11 +48,9 @@ You can specify multiple receivers by separating the value with a comma.`,
 			},
 			&cli.StringFlag{
 				Destination: &textMagicOpts.Subject,
-				Name:        "subject",
+				Name:        "title",
-				Usage:       "Subject of the message",
+				Usage:       "Title of the message",
-				Aliases:     []string{"s"},
+				EnvVars:     []string{"TEXTMAGIC_TITLE"},
-				Required:    true,
-				EnvVars:     []string{"TEXTMAGIC_SUBJECT"},
 			},
 			&cli.StringFlag{
 				Destination: &textMagicOpts.Receiver,