docs/node: Update state sync config to be compatible with Oasis Core v25.1

[anzoman]

The latest Oasis Core releases 25.1 for Mainnet and Testnet have brought config file changes when enabling state sync.

Node operators that have state sync configured in their configuration files note that:
The following configuration options have been relocated from the consensus.state_sync section to consensus.light_client.trust:

• consensus.state_sync.trust_period -> consensus.light_client.trust.period,
• consensus.state_sync.trust_height -> consensus.light_client.trust.height
• consensus.state_sync.trust_hash -> consensus.light_client.trust.hash

We are updating this here and also replacing the nonexistent Tendermint links with the ones from the CometBFT docs.

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