Update m_assumed_* chain parameters for 23.x

- `m_assumed_chain_state_size` doesn't seem to need to be changed for mainnet.
- No change needed for testnet/signet.

Co-authored-by: Suhas Daftuar <sdaftuar@gmail.com>

Author: laanwj

src/chainparams.cpp

@@ -105,7 +105,7 @@ class CMainParams : public CChainParams {
         pchMessageStart[3] = 0xd9;
         nDefaultPort = 8333;
         nPruneAfterHeight = 100000;
-        m_assumed_blockchain_size = 420;
+        m_assumed_blockchain_size = 460;
         m_assumed_chain_state_size = 6;
 
         genesis = CreateGenesisBlock(1231006505, 2083236893, 0x1d00ffff, 1, 50 * COIN);