Ensure transaction submitted with a valid blockhash

[BankkRoll]

• Update to "confirmed" commitment level when fetching the blockhash for a transaction. more info - Helius blog
• Bump version

[vercel[bot]]

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Name	Status	Preview	Comments	Updated (UTC)
docs-v2	❌ Failed (Inspect)			May 20, 2024 4:44pm

[gamba-labs]

Added via SendTransaction context configuration: https://github.com/gamba-labs/gamba/commit/bfab94a75229f2d3aa666e06a701ad88846ef658