chore: update ref to docs (🤖)

docs/latest/tutorial/debugging-main-process.md

@@ -21,10 +21,10 @@ process:
 
 Electron will listen for V8 inspector protocol messages on the specified `port`,
 an external debugger will need to connect on this port. The default `port` is
-`5858`.
+`9229`.
 
 ```shell
-electron --inspect=5858 your/app
+electron --inspect=9229 your/app
 ```
 
 ### `--inspect-brk=[port]`