Mise à jour de 'optional/luma_led_matrix.md'

optional/luma_led_matrix.md

@@ -1,3 +1,5 @@
+# Luma Led Matrix 7219
+
 #### enable SPI:
 ```
 nano /boot/orangepiEnv.txt
@@ -7,11 +9,12 @@ and add these lines :
 param_spidev_spi_bus=1
 overlays=i2c0
 ```
+
 Save and reboot
 
-```
-#### Prerequise :
 
+#### Prerequise :
+```
 dietpi-software install 130
 sudo apt install build-essential libfreetype6-dev libjpeg-dev libopenjp2-7 libtiff5 -y
 sudo pip3 install -U luma.led_matrix