fix: Correct command formatting in firmware update guide (#152)

* fix:  Command formatting  in firmware update guide

* Format

Author: jasiex01

docs/leo-rover/guides/firmware-update.mdx

@@ -26,8 +26,11 @@ login to your Leo Rover:
 Make sure you are connected to the Internet:
 
 <LinkButton docId="guides/connect-to-network" />
-and have the latest versions of the packages: ```bash sudo apt update && sudo
-apt upgrade ```
+and have the latest versions of the packages:
+
+```bash
+sudo apt update && sudo apt upgrade
+```
 
 And then, run the update script by typing: