fix wrong mod name in metadata after the mod rename

mods-unpacked/McModder-MultiplayerOverhaul/manifest.json

 {
-    "name": "BetterRandom",
+    "name": "MultiplayerOverhaul",
     "namespace": "McModder",
     "version_number": "1.0.0",
-    "description": "Better Item Generation",
+    "description": "Multiplayer as it should be",
     "dependencies": [],
     "website_url": "",
     "extra": {