[Snyk] Security upgrade debian from 9.5-slim to 9-slim#25

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Aruto7709p wants to merge 1 commit intomainfrom snyk-fix-3db4d53d6f8d9b045d020ae3fd56fdf1

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Commits on May 16, 2022

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