better README of cmd usage

PiperOrigin-RevId: 581867867

README.md

diff --git a/README.md b/README.md
index 571a59c..8d8bed8 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 #### Android phone
 
-1.  turn on `User Debugging` mode on your android phone.
+1.  turn on ***User Debugging*** mode on your android phone.
 1.  connect your android phone to computer.
 
 #### Google Home App
@@ -32,11 +32,12 @@
 
 ### Commissioning Matter device
 
-1.  run script `ui-automator --commission m5stack,34970112332,Office`
-    -   the parameters are
-    *   desired Matter device
-    *   pairing code of your Matter device
-    *   room that is going to be assigned
+```shell
+$ ui-automator --commission DEVICE_NAME,PAIRING_CODE,ROOM_NAME
+```
+*   `DEVICE_NAME`: desired Matter device, e.g. `m5stack`
+*   `PAIRING_CODE`: pairing code of your Matter device, e.g. `34970112332`
+*   `ROOM_NAME`: room that is going to be assigned, e.g. `Office`
 
 ## Roadmap