[Snyk] Security upgrade debian from 9.5-slim to 9-slim#11

Open

snyk-bot wants to merge 1 commit intomainfrom

snyk-fix-80618cd1dbb02276e840b3608fd77048

Commits on Mar 28, 2021

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