Bump futures-util from 0.3.1 to 0.3.21 in /crypto/backup_service/src/server#22

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dependabot/cargo/crypto/backup_service/src/server/futures-util-0.3.21tghack/tg20hack:dependabot/cargo/crypto/backup_service/src/server/futures-util-0.3.21Copy head branch name to clipboard