Bump redis from 2.10.6 to 4.5.3 in /tools/onboarding-server#9

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masterraiden-network/workshop:masterfrom

dependabot/pip/tools/onboarding-server/redis-4.5.3raiden-network/workshop:dependabot/pip/tools/onboarding-server/redis-4.5.3Copy head branch name to clipboard