clarify multisig

Author: aelmanaa

src/content/ccip/concepts/cross-chain-token/svm/token-pools.mdx

@@ -276,8 +276,8 @@ The mint authority follows this lifecycle for BurnMint pools:
 **Technical Requirements:**
 
 - Must use [SPL token multisig](https://spl.solana.com/token#multisignatures) - other multisig implementations are not supported
-- The Pool Signer PDA must be included exactly M times as a multisig signer
-- Multisig configuration must allow the pool to sign minting transactions independently
+- The Pool Signer PDA must be included at least M times as a multisig signer
+- Pool must be able to mint tokens for cross-chain transfers without requiring additional manual signatures
 
 **Why Pool Signer Must Appear At Least M Times:**