[Snyk] Security upgrade sinatra from 1.3.5 to 2.2.3#5

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sbarbeau-od wants to merge 1 commit intomasterfrom snyk-fix-ae89ce6db59e900d96650b8e0436ec56

+16-9

Commits on Nov 30, 2022

fix: demo/Gemfile & demo/Gemfile.lock to reduce vulnerabilities
snyk-bot
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