[Snyk] Security upgrade debian from 9.5-slim to stretch-20220509-slim#218

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strezless wants to merge 1 commit intomainfrom snyk-fix-526db2525175c8f4ca9b9a8a16c694a8

+1-1

Commits on May 13, 2022

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