docs(SystemBars): Mention it's bundled with @capacitor/core (#8300)

Author: OS-pedrogustavobilro

core/system-bars.md

@@ -1,6 +1,8 @@
 # SystemBars
 
-The SystemBars API provides methods for configuring the style and visibility of the device System Bars / Status Bar.  This API differs from the [Status Bar](https://capacitorjs.com/docs/apis/status-bar) plugin in that it is only intended to support modern edge to edge use cases moving forward.  For legacy functionality, use the [Status Bar](https://capacitorjs.com/docs/apis/status-bar) plugin.
+The SystemBars API provides methods for configuring the style and visibility of the device System Bars / Status Bar. This plugin is bundled with `@capacitor/core`.
+
+This API differs from the [Status Bar](https://capacitorjs.com/docs/apis/status-bar) plugin in that it is only intended to support modern edge to edge use cases moving forward.  For legacy functionality, use the [Status Bar](https://capacitorjs.com/docs/apis/status-bar) plugin.
 
 | Feature | System Bars | Status Bar |
 | ------- | ----------- | ---------- |