Update desired hashes per tick to 2.8M

Active on mainnet-beta (epoch 587), testnet (epoch 588) and devnet (epoch 636).

Introduced in solana-labs/solana PR #33600.

Feature id EWme9uFqfy1ikK1jhJs8fM5hxWnK336QJpbscNtizkTU.

Vortex

• Consensus leaderboard
• Fees leaderboard
• Validators
• Stake pools
• Decentralization
• Client versions
• Cluster status
• Governance
• Feature gates
• SIMDs
• Activity
• API and AI usage