fix: update composable with new chain info (#6)

Hey Ghost, this PR will update the information inside of the composable
chain config to have the new endpoints, and address prefix. please check
it out when you have time

chains/mainnet/composable.json

@@ -1,18 +1,18 @@
 {
-    "chain_name": "composable",
-    "api": ["https://lcd-composable.whispernode.com:443"],
-    "rpc": ["https://rpc-composable.whispernode.com:443"],
+    "chain_name": "picasso",
+    "api": ["https://api-picasso.whispernode.com:443"],
+    "rpc": ["https://rpc-picasso.whispernode.com:443"],
     "snapshot_provider": "",
     "sdk_version": "0.47.3",
     "coin_type": "118",
     "min_tx_fee": "8000",
-    "addr_prefix": "centauri",
+    "addr_prefix": "pica",
     "logo": "/logos/composable.jpg",
     "assets": [{
         "base": "ppica",
         "symbol": "PICA",
         "exponent": "12",
-        "coingecko_id": "composable", 
+        "coingecko_id": "picasso", 
         "logo": "/logos/composable.jpg"
     }]
 }