Update firmware.mdx

Author: SummerSigh

docs/hardware/Firmware/firmware.mdx

@@ -78,7 +78,7 @@ Select your device on the corresponding COM port. Then, click on the "Install Op
 
 ### Step 4 
 
-After flashing your board make sure to **Unplug and replug** your board into a power source. This way it will start using the new fimrware.
+After flashing your board make sure to **Unplug and replug** your board into a power source. This way it will start using the new firmware.
 
 After that you're done!