Update machinetag.json

Added Pig Butchering scam as cryptocurrency threat

cryptocurrency-threat/machinetag.json

@@ -42,6 +42,10 @@
     {
       "value": "Crypto Robbing Ransomware",
       "expanded": "Cyber-extortionists began distributing new malware that empties cryptocurrency wallets and steals private keys while holding user data hostage."
+    },
+    {
+      "value": "Pig Butchering Scam",
+      "expanded": "Cryptocurrency investment fraud that lures individuals into investing their money in seemingly legitimate and profitable ventures."
     }
   ],
   "refs": [