Remove "allowBugReporter" from system.json

Issue report

Description of the issue

A warning is shown for the Conan2d20 system in the setup area of FoundryVTT v12

Expected behavior / Proposed solution

I found a tech guide with the necessary fix and tested it successfully on my own v12 server.

Tech guide: https://www.foundryvtt-hub.com/technical-guide/#manifest-file

You can get the fixed system.json here: Kemeros/foundryvtt-conan2d20@908db8ed

Or replace the end of the system.json file with these lines:

	"bugs": "https://gitlab.com/fvtt-modiphius/foundryvtt-conan2d20/-/issues",
	"url": "https://gitlab.com/fvtt-modiphius/foundryvtt-conan2d20",
	"manifest": "https://gitlab.com/fvtt-modiphius/foundryvtt-conan2d20/-/jobs/artifacts/release/raw/system.json?job=build",
	"download": "https://gitlab.com/fvtt-modiphius/foundryvtt-conan2d20/-/jobs/artifacts/release/raw/conan2d20.zip?job=build",
	"license": "LICENSE",
	"background": "systems/conan2d20/assets/images/conan2d20-splash.webp",
	"flags": {
		"allowBugReporter": true
	}

Note: I wanted to send a merge request but, unlike GitHub, Gitlab's web editor doesn't support adding a DCO/sign-off-statement. I'm not setup for git so i will let someone else do the honors. ;)

Reference

N/A

Steps to reproduce the issue

1. Install the Conan 2d20 system in FoundryVTT v12
2. Warning

Environment

• Browser with the issue: N/A
• Foundry VTT version: 2.2.5
• CONAN 2D20 version: v12