fix typo.

HirohitoHigashi · HirohitoHigashi · commit 1f70ff878c29 · 2023-09-27T13:57:19.000+09:00
diff --git a/mruby_io_UART_en.md b/mruby_io_UART_en.md
@@ -69,7 +69,7 @@ Device-specific
 Example of use:
 
 ```ruby
-uart1.setmode( bardrate:38400 )
+uart1.setmode( baudrate:38400 )
 ```
 
 ---
diff --git a/mruby_io_UART_ja.md b/mruby_io_UART_ja.md
@@ -69,7 +69,7 @@ uart2 = UART.new("/dev/cu.usbserial1", baud:19200, parity:UART::EVEN )
 実行例
 
 ```ruby
-uart1.setmode( bardrate:38400 )
+uart1.setmode( baudrate:38400 )
 ```
 
 ---
