[docs] Update code block styles

docs/flashing/ltchiptool.md

@@ -46,7 +46,7 @@ The main window is somewhat similar to [NodeMCU PyFlasher](https://github.com/ma
 
 	The content below serves as a short documentation page for [`ltchiptool`](https://github.com/libretuya/ltchiptool) and is mostly meant for advanced users.
 
-```shell
+```console
 $ ltchiptool --help
 Usage: ltchiptool [OPTIONS] COMMAND [ARGS]...
 
@@ -89,7 +89,7 @@ If you want to flash unrecognized/raw binaries (or fine-tune the flashing parame
 
 ### UF2 Example
 
-```shell
+```console
 $ ltchiptool uf2 info ./arduinotest_22.08.01_wb2l_BK7231T_lt0.8.0.uf2
 Family: BK7231T / Beken 7231T
 Tags:

docs/flashing/platformio.md

@@ -6,9 +6,9 @@ PlatformIO projects developed with LibreTuya can be flashed just like any other
 
 LibreTuya has a built-in firmware uploader, based on [ltchiptool](ltchiptool.md). Pressing `Upload` in PlatformIO IDE does all the work for you.
 
-If you have more than one COM port,configure your PIO project first:
+If you have more than one COM port, configure your PIO project first:
 
-```ini
+```ini title="platformio.ini"
 [env:my_board]
 monitor_port = COM96
 upload_port = COM96