Update coins.json

Co-Authored-By: hewig <360470+hewigovens@users.noreply.github.com>

Author: riptl

coins.json

@@ -1311,7 +1311,7 @@
         "id": "filecoin",
         "name": "Filecoin",
         "symbol": "FIL",
-        "decimals": 8,
+        "decimals": 18,
         "blockchain": "Filecoin",
         "derivationPath": "m/44'/461'/0'/0/0",
         "curve": "secp256k1",