Add notice regarding the limitation of Pull Requests

Author: zircon-tpl

CONTRIBUTING.md

@@ -1,3 +1,7 @@
+**NOTICE: AS OF NOVEMBER 16TH, 2020, PROJECT TOPAZ IS ONLY ACCEPTING COMMUNITY PULL REQUESTS FOR CRITICAL CRASH FIXES, EXPLOIT FIXES, AND VERSION UPDATES. ANY PULL REQUEST FOR ANOTHER PURPOSE -- SUCH AS NEW CONTENT, REFACTORING, OR NON-VITAL FIXES -- WILL BE CLOSED WITHOUT COMMENT OR REVIEW.**
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 # Issue Report Contributions:
 
 * If an issue involves incorrect NPCs or text, please include your client version (type `/ver` in game)