cmd: fix small typo in mnemonicCheck

cmd/lncli/commands.go

@@ -1235,7 +1235,7 @@ mnemonicCheck:
 		// want to use, we'll generate a fresh one with the GenSeed
 		// command.
 		fmt.Println("Your cipher seed can optionally be encrypted.")
-		fmt.Printf("Input your passphrase you wish to encrypt it " +
+		fmt.Printf("Input your passphrase if you wish to encrypt it " +
 			"(or press enter to proceed without a cipher seed " +
 			"passphrase): ")
 		aezeedPass1, err := terminal.ReadPassword(int(syscall.Stdin))