Create a dedicated sub section for "Integrated Monitor" item in IDE 2.x SM change docs

The previous structure would not allow multiple changes to be listed.

Author: per1234

content/software/ide-v2/tutorials/ide-v2-serial-monitor/ide-v2-serial-monitor.md

@@ -24,6 +24,8 @@ You can also follow the [downloading and installing the Arduino IDE 2.0](/en/Tut
 
 ## Notable Changes
 
+### Integrated Monitor
+
 One major change that was introduced with the Arduino IDE 2.0 is the **integrated Serial Monitor**. The older versions of the editor features an external window that matches the port/board that we select. 
 
 The Arduino IDE 2.0 works a bit differently. Instead of opening an external window for the Serial Monitor, it shows up where the console log is located, as an additional tab. To understand how this works, let's take a look at how the old editor works:
@@ -36,7 +38,7 @@ Now, let's take a look at the IDE 2.0. Notice how the Serial Monitor is located
 
 The Serial Monitor settings are also located here, such as adjusting the baud rate and sending messages. 
 
-### Advantages with New Integration
+#### Advantages
 
 A major advantage with having the Serial Monitor integrated with the editor is the possibility to have multiple monitors open simultaneously. In the old editor, when changing the port/board, it changed across all windows. In addition, we were limited to **one Serial Monitor window**, an obstacle that the IDE 2.0 removes.