Update Parsec validator name and correct network to Mainnet (#586)

- Simplify name from "Parsec x Firstset Community Validator" to "Parsec X Firstset"
- Correct description from Testnet to Mainnet
- Remove "the" from description for consistency

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <[email protected]>

Author: bernatfp

mainnet/03c9c18a64fbc3908b4a49b74dea1cd2c0363943c88fa70a32ab12facd80db4f79.json

@@ -1,10 +1,10 @@
 {
   "id": 71,
-  "name": "Parsec x Firstset Community Validator",
+  "name": "Parsec X Firstset",
   "secp": "03c9c18a64fbc3908b4a49b74dea1cd2c0363943c88fa70a32ab12facd80db4f79",
   "bls": "a7443fabc9cad89ea72cf910358c492d867dda616f25ea2e3da496a33d6903c53064f73c9ee577640b384945d70ccaed",
   "website": "https://x.com/parsec_finance",
-  "description": "Community validator for the Monad Testnet by Parsec and Firstset",
+  "description": "Community validator for Monad Mainnet by Parsec and Firstset",
   "logo": "https://www.firstset.xyz/parsec.png",
   "x": "https://x.com/parsec_finance"
 }