[Snyk] Security upgrade debian from 9.5-slim to 9-slim#191

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snyk-bot wants to merge 1 commit intomainfrom snyk-fix-5f5c215dbab3bc1232678c1381fb6300

+1-1

Commits on May 15, 2022

fix: content/actions/creating-actions/dockerfile-support-for-github-actions.md to reduce vulnerabilities
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